INCORRECT AMOUNTS DEBITED FROM MY BANK ACCOUNT

I have a contract with MTN (My MTN Choice 100 mins) - R499-00 per month and my contract has a usage limit and therefore I can Top Up once I reached my limit with data, airtime etc.<br> On 30 September 2015 an amount of R711-26 was deducted, on 31 October 2015 an amount of R1 219-86 was deducted, on 30 November 2015 and amount of R1 220-69 was deducted and on 31 December 2015 an amount of R1 925-03 was deducted.<br> <br> I tried constantly to reach MTN on their Call Centre by using *** and 808 and held on for 15 to 20 minutes every time and because of my working hours it is impossible for me to visit a branch to resolve the issue.<br> <br> I hereby request MTN to contact me immediately and inform me when I can expect the necessary refund of the amount they deducted in error.<br> <br> I confirm that I am at a point where I will rather go to another Service Provider and let them \buy out"my contract with MTN.<br> <br> I therefore expect an explanation from MTN as soon as possible as I am also considering Legal Actions should it be necessary.<br> <br> Thank you"