Dispute on Billing for Data

I took out a cell c contract in December 2020, Laptop deal . Last year August I received a statement and i was billed R7883.18 for 28.10 GB ? After numerous phone calls and emails , to cell C my billing query is still not sorted. I have requested on numerous occasions that management needs to call me back and i am still waiting to discuss the charges i was billed. how can you charge a client 28.10 GB R7883.18????? your feedback received from Lesgo ( The billing is under R2.61/MB on the 23.65GB. The charge is calculated in MB and not GB.) is not good enough.

What makes it worse is that Cell C took it upon themselves to combined three off my contract that was taken out of separate occasions . They had the audacity to block all my contract and was told that i had to the full amount . Who authorized you to combine my contract????

I have been a loyal client with Cell C for the last 8 years and this is how i get treated??? Cell c you list me on credit score for bad payer but they can not even get management to call me back ???

I hope after this they can get this dispute resolved and get my contract sorted.