Telkom has still not cancelled my service!

I cancelled my adsl service via my online Telkom profile on 7 March 2018 and have still not been contacted to confirm the cancellation, which I have references for. I spoke to 2 agents so far as well as chatted to the online agents on the website and they all told me to wait for Telkom to call me back. The worst part, they are still putting the debit order through every month. I want my service to be cancelled, my monthly payments to be refunded for April and May, as well as my deposit to be refunded.