Debit order amount

I am so disappointed by how Vodacom always treats me. I took a contract with them December 2020 of which on the catalogue the amount its there yet on my account statement its a totally different amount. When asking what could possibly be the reason why the amounts are different they always tell me about my other contract. I received a call some time last month from vodacom to discus with me my price change and asked if I have received an SMS informing me of such which I did not get. Then later after the call an sms was send to me and I quote "Hi. We're sorry you didn't get your April price change update due to a technical issue on our side - both your April and May increases are on us! From 1 June 2022 there'll be a price change to your plan, view it here: https://bit.ly/3M4JFGy. T&Cs apply. Further together, Vodacom." Yet month end of April a while R865.97 was deducted from my account from a whole maximum of R695,98 that I last paid. I do no longer get what was advertised on the cataloged which 22GB and an extra 2 GB on my tablet. I have send an email querying why was I changed that amount because the agreement was that I will pay it on the 1st of June till today I have not received any reply from their customer service. This service provider is annoying me. I've been their customer for a very long time but at this point i'm fed up with it not doing as they say they would. I would never recommend anyone to use this ****