MTN Month to Month Contract is a ****

I signed up for 300GB made for home internet for a 24 Month contract with MTN from Nov2021 to Nov2023, I was paying R299.00 per month. I was receiving monthly 150GB anytime data, 150GB night data and 50GB YouTube data. My contract ended and I was on a month to month and I was still receiving the same data. MTN increased my subscription fee and from March 2024 and reduced my data from 150GB anytime to 75GB anytime and 150GB night data. According to their monthly invoice I'm being billed 50GB YouTube, 20GB anytime, 50GB anytime, 5GB anytime, 15GB night, And 150GB data. Unfortunately I'm not receiving or allocated data as per the invoice. I have phoned MTN multiple times and I get a different explanations of how I am being billed from their *********** consultants.