Terrible service

Last month on the 29th of March 2016, Telkom deducted the incorrect amount of R1700 from my bank account. I reversed the amount and contacted them. I spoke to Anastacia who promised that she will escalate my query to accounts and they will contact me. Almost three weeks later, no call has been received only sms's informing me that my services will be disabled. I am not impressed with the fact that I was waiting for a call as promised not sms's. Now they have disabled my services without making the promised call. I would like Telkom to unlock my services on all my gadgets, correct my billing and give me the correct amount that I need to pay for March 2016. The other amount that they want me to pay for April must be corrected as well and then they can deduct it from my account as per our agreement.