MTN ****med me by reducing my data allocation and kept my payment the same

MTN sold me a data Deal which came to an end in Nov 2022. I didn't renew the contract or cancel it so they moved the contract to a month to month. They debited me in December 2022 and January 2023 but they did not load the data for January. I called them in January 2023 to ask to cancel the contract since I was debited but did not receive the data. They first moved me from pillar to post when they had to reimburse me, being transferred from one department to the other (Retentions, billing, contracts) They then offered me a consolation of 300GB of ANYTIME Data for R299. I took the deal because it looked good. From January 2023 when they have been loading 300 GB anytime until of late when they decided to reduce the data without my knowledge.

I have just realiased that the 300GB anytime that I used to get has now being reduced to 150 GB anytime and 150 GB Night data. I have never signed up for a contract that splits data between day and night and will never agree to it. I called MTN Contracts, they referred me to Retentions to fix the issue, retentions referred me to the ***** department to investigate what happened. ***** department referred me to billing since my case did not meet the ***** defination. The billing department sent me back to Retentions since the mistake was done by retentions. The retentions acknowledged that indeed initially my contract was on 300GB anytime and not sure why it was later split, They then referred me to allocations for them to fix my allocation. The allocations people said they can only assist with changing debit order dates and not the allocation of data. They transferred me back to Retentions and the retentions person after hearing my story just put me on hold and left me like that.

I found this to be very unprofessional for a valid complaint. I wish I never renewed my data deal with MTN. When I asked them to cancel it. They want to charge me early cancellation. Kore there's nothing I can do. I just have to enjoy being ********** daylight and it hurts. Why is MTN doing this to its customers?