Vodacom bad service and ridiculous actions

Vodacom service is very poor and they are spiteful. I had a 24 month contract which is at a certain price and they have increased the contract prices during 2022. During July I bought data through there payment app. the money went through my bank but I received no data. I have contact and send them many times and nobody bothers to correct the situation. My contract expires end September and I gave notice to stop the contract. I must still be able to use the data allocation for September before the contract ends. What they have done now is to decrease my speed to less than Edge and the data goes on and off. Limiting the use of the remaining data. This is ridiculous.