Struggles of Closing the account

I called rain 3years ago and told them I can no longer use their services because I moved from where I was staying to another place, and where I moved to the was no coverage, can they please close my account, they agreed to do so, to my surprise last year they called me and said my account is in areas I'm owing R1000, I initially refused to pay coz I wasn't using the data and the simcard I destroyed it, I was then sent to debt collectors, I finally paid the money, but called them and told them to close the account and they agreed. After finishing to pay that R1000, they activated my account and debited me R150 for two months, I called them again and explained this and they said they Goin to close the account, last month I checked on the account it said the account is going to be closed month end of January, the account is not closed, they keep debiting R60 on my account, and I'm gonna be debited again on the 1st of March, I went to my bank to try stop them from debiting and my bank said it's a subscription not a debit so they can't do anything. So I really don't know what to do now coz on their website there's no email address, there's no link where you can unsubscribe