Horrible service

Called Vodacom in December to cancel two contracts that were expiring end of January. Spoke to a lady called Sandra who advised that I rather downgrade. I agree with her as it seemed like a good option but called back the next day to have the contracts cancelled. A consultant named Njabulo assisted and confirmed that the cancellation was done. On 1st January I called Vodacom as I was having problems with one of my sim cards the consultant then advised that I do a sim swap at a voda shop since my sim is contract I then advised that I had cancelled my contract but apparently this was not processed. I was transferred to some guy called Sanele who assured me that the matter will be resolved in twenty four hours. I called Vodacom today following up on the matter and a voice note said that my calls to Vodacom had been blocked due to the many calls that I had made to them so they are preventing ********** activities. I was given a number to call but made aware that this will be charged at R2 per minute. I need Vodacom to cancel the contracts as I had requested as I cannot risk being blacklisted for not being able to pay R150 to them. I DON'T NEED A SERVICE FROM A PROVIDER THAT IS GOING TO CUT COMMUNICATION WITH ME WHEN I RAISE QUERIES THAT RHEY ARE UNABLE TO RESOLVE.