Very frustrated and disappointed

Hi i have been a customer since june 2020 i first had a capped lte package then when we moved i moved to a fibre package and when we moved again last year i went over to flte. Due to cancelling my fibre on 6 October 2023 i was still liable to pay for the fibre till end of November due to 30 day cancellation policy. When the end of november came i was billed for the final fibre and for the new flte package so that i could get the router however i had no funds available in my account at that time so my debit bounce. On December the 7th i had money deposited into my account and i used a Supersonic payment portal to pay my outstanding fees. I received no response so i started to call to see when my router would be delivered and i was told my account is undergoing maintenance and therefore i would have to wait after numourous phone calls and a week i finally found out through a agent by the name of Nthabiseng that the system was being upgraded and according to billing i had not paid because my funds didnt get allocated accordingly that i paid using the payment portal she arranged with the supervisor to sign off on the router but due to all the issues it only arrived after christmas. During February 2024 i received a invoice for R499 which is my flte package amount but at the end of February i was debited R2664 and when i tried to query why i am debited so much i could not get hold of billing wether by telephone or by whatsapp i am unable to get to the billing department a agent did send me today 9/3/2024 my full statement history abd on it the payment i made in december using the payment portal isnt showing and therefore that R2163 from end of november was debited now and end of February. Happiness from supersonic has a email from me with my proof of payment from that payment portal and i would like to have my funds deposited back to my account and someone from management to contact me and explain to me how we going to make this right because as a customer i feel i am being ignored and no consideration is being given to me especially after i have spend alot of money on airtime and data trying to sort out this problem that isnt even my fault to begin with and i really feel cheated at this point. Billing and project management should be available in the same time as technical support and they should be available to talk to the clients and not hide behind technical support! I hope to hear from you soon so we can resolve this problem otherwise unfortunately u will be losing a client.