Telkom do not respond to a cancellation of subscription

I cannot believe that it is so difficult to cancel a Telkom mobile subscription. I went to Telkom Wonderboom junction on 12 April to cancel our business subscription, take note the mobile phone was already paid up a year ago we only pay subscription fees for the line and the outgoing calls. The Telkom Wonderboon junction branc gave me the cancellation forms to fill in, and i need to email this with copy of account holders Id and the cancelation request on a company's letter head. The cancellation request was send 12 April giving notice for 12 May. I resend again 30 April. I ask Telkom to use my R700 deposit for the final invoice. I only received a response back on 23 May from Luvhengo Tautela to confirm she was trying to call me but she could not get hold of me and I reply to ask her to please cancel this subscription I put the phone off from 1st May they can see on the statement no outgoing calls or received calls came in from 1 May. Up untill today no comment received. There are also no land lines on the cancelation form and Telkom Wonderboom Junction are always busy and ques do not move. Last month Telkom try to debit my account, I went to reverse the debit order. This month Telkom try to debit my account again I stop that at the bank. Today I received a new invoice with the new months subscription fees. It just looks it is easier for Telkom to just debit your account as to respond to your email. Me and my husband are in process to immigrate and we really want to sort this out but it seems to me on the end of the day the Bank is going to notify Telkom that they need to stop debitting this closed account the people immigrate long time ago. Telkom account nr ********** 56938