Overcharging on subscription

Today is my due date to make payment but already my services are disconnected. I was on compact package and last night I downgraded to access package. Today I wake up service suspended and amount due R460. I spoke to customer service via whatsapp and they tell me I was on price lock since 02/02/2022 and that I was receiving a discount on and that R460 is for cancelation fees and the discounts I got. She also said that price differ when you pay with cash and via debit order, that was the first time I heard that to my understanding prices are standard does not matter what method you use to pay. I went on to contact customer service via Facebook now, they tell me about a contract was entered into on the 20th of May 2022 and canceled on the 07-07-2022 but on the 20th of May 2022 I made a normal upgrade on whatsapp and not a price lock deal. They say I need to pay R180 fee for that and 230 for access fee plus reconnection. Still on facebook, they tell me that the contract was now entered into on 12 of May 2021 and it was a compact plus deal. I ask about the contract on the 20th of May 2022 they spoke about, and they try to deviate from that and confuse me. I asked them to provide me with recordings or something written stating that I took out these contracts, because I have screenshots to support my statements. After us debating this new date and contract they say it was a human error and the correct date is from the 12-05-2021 for 579 compact plus. As it is right now my service are suspended and I will not pay R460 for access package for contracts that I know nothing about and that you have no idea about. You are used to over charging people and getting away with it not this time. I do have screenshot of all the chats I had with you.