Useless MTN playing tricks

I took 2021 between May and July, the package for the contract offered was for 250G+100minutes and 1G on my preferred number for R249. March 2022 I started to notice my data was running out, in a first week,I thought it was data went up but that was not the case. On the 20 July I went Mtn to check how much data am I receiving every month from my contract,I was informed that I'm on a 30G monthly contract from 250G whilst my installment was still R249 even though I was not receiving the 250G anymore I was advised to contact mtn customer care as the outlet was just a franchise of mtn. On the 28th of July I contacted mtn customer care regarding my contract,I was given a reference number of *** by Sharon I asked her to resolve my issue she said my contract was never a 250G it was always 30G,and she claimed maybe it was a promotion and she referred me to Pia I asked her to terminate my contract as I was not receiving what we agreed to ,she told me I will be liable to penalty fee for terminating the contract prematurely and I told her Im only asking for this contract to closed as I was the one who was wronged by mtn, she referred me to Thabang at customer care I asked him regarding this matter he told me I should ask for my Data Usage report,and he put me through Data Usage department I spoke to Tlotlo who asked for my email so he can send it till date he haven't. I tried to stop the debit order as I'm not using the router anymore but they changed their reference and the dedicated twice the amount on October month plus extra amount on my account.