I paid R1062

I paid R1062. towards my contract account which was blocked on the 29/06/2023 via EFT and on the 30/06/2023 they debited the same amount meaning in June I paid R2124. I called them requesting for my refund then I was told to call again after 7days reason being the money hasn't reflected at that time. On the 11/07 I called them again then they logged a call on my behalf requesting refund. Last week I received a call from telkom I was told that I can't get my refund in full because they already allocated it in my July account 1.I am disputing this,who granted telkom permission to take my money. 2.In my contract I never signed allowed telkom to take my money any time they want. 2.What makes telkom so special that I can pay R2124 in one month for the premium of R531 3.This is daylight ******* NB//I WANT MY MONEY BACK IN FULL I've worked hard for it.