Multiple stripe charges being created from a NodeJS function with a loop - node.js

Question

I have a NodeJS API running which uses Node Schedule to call a function every month.
This function gets a list of clients from my MYSQL db.
The clients are looped through and then each is charged for SMS's they have sent this month.
My issue is that although it is running, most clients were charged between 2 and 5 times (none only once).
This leads me to think I have issues with my stripe call or perhaps the NodeJS loop... or the Async/Await properties.
App.js:
schedule.scheduleJob("0 0 1 * *",async () => {
console.log("SMS Charging Schedule Running");
await stripePayments.chargeCustomers();
})
stripePayments.js:
module.exports = {
chargeCustomers : async function chargeCustomers() {
{
var stripeCusID;
var success = false;
try{
//I get the list of clients here. I have checked this query and it is 100% correct, with only one record per client.
var sqlString = "CALL chemPayments();";
var countCharged = 0;
authConnection.query(sqlString,async(err,rows,fields)=>{
let chemRows = rows[0];
if(!err){
success = true;
for (let i=0; i < chemRows.length; i++){
stripeCusID = chemRows[i].stripeCusID;
chargeValue = chemRows[i].chargeValue;
chemistName = chemRows[i].chemistName;
chemistID = chemRows[i].chemistID;
countSMS = chemRows[i].countSMS;
//console.log(stripeCusID);
try{
await chargeSMS(stripeCusID,chargeValue,chemistName,chemistID,countSMS);
countCharged++;
}catch (e) {
// this catches any exeption in this scope or await rejection
console.log(e);
}
}
if (countCharged == 0){
console.log("No SMS Charges to perform - " + Date(Date.now()).toString());
}
}
else
{
console.log("Error calling DB");
}
})
} catch (e) {
// this catches any exeption in this scope or await rejection
console.log(e);
//return res.status(500).json({ Result: e });
}
}
}
}
I then charge each client.
async function chargeSMS(stripeCusID,chargeValue,chemistName,chemistID,countSMS){
let customerObject;
let payMethodID;
let secondaryPayMethodID;
let payMethodToUse;
customerObject = await stripe.customers.retrieve(
stripeCusID
);
payMethodID = customerObject.invoice_settings.default_payment_method;
secondaryPayMethodID = customerObject.default_source;
if(payMethodID != null){
payMethodToUse = payMethodID;
}else{
payMethodToUse = secondaryPayMethodID;
}
await stripe.paymentIntents.create({
amount: chargeValue,
currency: 'aud',
customer: stripeCusID,
description: `SMS Charges: ${countSMS} sent - ${chemistName}`,
payment_method: payMethodToUse,
confirm: true
},
function(err, response) {
if (err) {
console.log(chemistName + ": " + err.message + " " + stripeCusID + " " + chargeValue );
return;
}else{
console.log(`Successful SMS Charge: ${response.id} ${chemistName}`);
chemCharged(chemistID);
}
})
}
This final step then updates teh database and tags each sms as "charged" = true, thus they are no longer on the initial select query.
async function chemCharged(chemistID){
try{
var sqlString = "SET #chemistID = ?;CALL chemCharged(#chemistID);";
authConnection.query(sqlString,chemistID,async(err,rows,fields)=>{
//console.log(rows);
if(err){
console.error("Error marking chemist as charged");
}else{
console.log(chemistID + "updated on SMS DB");
}
})
} catch (e) {
// this catches any exeption in this scope or await rejection
console.log(e);
//return res.status(500).json({ Result: e });
}
}
My largest issue is that when I copy this code and run it with the stripe TEST key... I can't replicate the problem!! The code runs fine and each client is only charged once, but when I leave my code for the cron to run at the start of each month.. I get heaps of charges per client. Sometimes 1 or 2, but up to 5 of the same charge goes through!