Very Poor service

i recently downgraded my plan from the 200gb plan to the 120gb plan from 1 December 2020. i noticed that my roll over data was not correct. i called in to query this and was advised that it would be looked at. i never received feedback. i then logged a complaint on hellopeter and someone did not even bother to look at my query properly. they just looked at my usage which was around 54gb and sent that to me on email from a noreply email address so that i cannot query it. i need someone to look at this properly. i was on the 200gb plan for November. I need my roll over data to be corrected or i need to be refunded the difference for november because i payed for this plan. i have also been billed R 599 for December but im on the R 399 plan. someone needs to ensure that i am credited for this as well.