My contract with Vodacom is just foul play

Late in 2018 I took a contract with Vodacom for a wi-Fi router of which it was offered telephonically to me. The lady explained to me that I will be receiving 5G on monthly basis for an amount of R199.00 and when that is finished I be out of data for the month and unfortunately it can only be topped up on the 1st of every month so I took this option even though she explained other options to me. The lady called me again on the next day to tell me the instalment won't be R199.00 per month it will be R200 and some change, which was still ok with me. The router was delivered to me and I was so excited because this was my very 1st contract that was not declined. Early in 2019 and amount of R3000 and some hundred rands was deducted from my account and luckily for me I didn't have enough money for such a debit order and it was not even done on a correct date. I called Vodacom to ask what is happening and I was told I went out of data and I continued using the data of which now it was over 5G. All I can remember from this I will use my 5G when its finished I will put the router away until month end and I told them what they saying is incorrect and it was also not the terms of my contract. I fought with Vodacom trying to sort this out and I will be told I need to pay this amount immediately or in two instalments ,and at this stage I am not receiving data anymore from Vodacom and I refused to pay this amount. Please note that I get request the telephone record of when the contract and Vodacom refused to give it to me and told me unless it is a legal matter where I am taking them to court. In all I never received this recoding to date instead my account was handed over to their legal department which now made me chose how many instalments I want to pay, which was quite shocking because at first I was told to pay it at once or two instalments. In November 2019 I agreed to pay R500 on monthly basis and I am still paying that R500 and I don't receive any statement to show how far I am with the payments. I don't want this contract anymore considering that they refused to give me the recording of which I believe it is within my rights to obtain it. Please remember the R500 I am paying per month is just for data not the contract of which to me it was foul play and I am not happy with their service and the way they handled my situation.