Paid up letter- complain

In December i received an sms offering me a payment discount which I then called the call centre to confirm and it was confirmed by the agent i spoke to that i needs to be paid before end of January 2022 so the amount was split in two equal installments and last payment was done on 26 January 2026. On the 27 I received an sms reminding me of the payment that i need to make in 28th January which is the same Payment made a day before i called the call centre and they confirmed receipt of the last installment which i then ask to be sent a "paid up letter and was told that I will receive within days and i have called today to follow up if my request is in process and was told my call could not be transferred i will be phoned back.

After reading so many complaints from unhappy clients that are in the same situation like me make me stress as my ITC is a mess because of this a/c i cannot get a job due to this can someone please assist and prioritise my matter but stopping this bad service that everyone is complaining about and stick to youe word? My reference is 854623. I really need to be out of your shackles and i kept my promise and would really appreciate if you could do the same. So that i can start to pick up the pieces of my life.