Upfront payment not reflecting from MTN

On 14 July 2023, I app**** for the MTN Month to Month 10Mbit/s "Stater" plan: R249/month, and then the saleswoman called me to complete the application. She told me I must pay R393.58 in order for the router to be delivered, She confirmed that on that R393.58 she pro rata, and payment for August was covered, After a few minutes she sent me a link that I made payment with my card. After the payment, she called me to confirm payment and I also received a payment confirmation email from MTN with a completed order number: ***, the email also confirmed the amount would reflect on my statement. On the 19th of July, the router and Sim card was delivered, all packaging were in order. On the 2th of August, I received an email from MTN with my statement stating that I owe R594.38 and the R393.58 was not on that statement.

I started making phone calls to 083 135 and they transferred my call to the contract department, apparently, they couldn't assist me. On the 11th of August, I received an SMS" To stay connected, please pay R605.88 The next thing they started sending the following SMS: Your order has been submitted Order Ref no *** Your order has been submitted Order Ref no ***

On the 16th my Internet was terminated and I decided to send an email with my query, on the 17th I followed up and I received the below response:

"Please advise which reference number did you use for the payment as it's not reflecting?" I told them that I did not use any reference number because they sent me a link to make the payment and I also provided the email with that link. On the 18th August, I sent another email stating that ill pay the R605 but I would need my R393.58 credited. I have also attached my bank statement showing that R393.58 was deducted from my account. On the 18th of August, I called the MTN consulted to make arrangements to pay the R605, she then told me to make payment on the 19th which was Saturday. I made the payment of R605 at MTN store however I continued to receive an SMS stating that I failed to make a payment of R822.4 billing profile BA ***. Since my last email no feedback from MTN Customer care