******* deductions

I had a data contract , I believe number is ***, of 5GB a month at R99<br> I was called to upgrade in December 2015, and again in January 2016, I declined since the data offered was 1GB, and I told them that my needs was way above the current contract I had which was 5Gb at the time,<br> I send them a cancellation letter, signed on 21, January 2016. at 10:49:46 +0000<br> <br> The following month , 29 February 2016, they deducted R290.25. I sent them another letter, and copied the agent that I initially spoke too, [Email Removed] and [Email Removed] <br> I queried the deductions, and no response was forthcoming,<br> Again on 31 March 2016, there was another deduction of R99<br> I called [Email Removed] and she said I must go to the nearest store and complain there,<br> <br> I find it strange that this contract was signed and sealed over the phone, Why can't it be cancelled over the phone?<br> Why should I write letters of cancellations (Which I did), and it still does not cancelled?<br> I would like my refund<br> <br>