Taking my money and refuse to pay it back

Hi

I cancelled my line rental and ADLS line from telkom on the 30TH of October 2017, Which means that I had to pay for November which is fine but then you took another R624 rand from my account in December

Now that I want the money back that you so easily took from my account after it was canceled there is issues saying that there must be 30 working days before it gets canceled . That is so wrong

Attached is 2 documents stating that it only takes 20/21 Business for the cancellation process.

So I want someone to assist me with this situation to rectify the problem and debit my cash back into my account ASAP.

my reference number is ********** 7