Day Light *******!!!!!

I had a device on my contract that expired in November so because i didn't cancel i was charged R99 for the data and minutes. Now i got a shocker when the next statement charged me R456.50 but immediately i got an sms on the number to say i was overcharged and the money will be credited back to my account. Now the next month i am getting the same charges again. For what. I called and complained and was told they will call me back but no one ever calls back from Telkom this is NOT THE FIRST TIME. I'm tired of complaining and i am ever regretting buying things from these ungrateful unprofessional people. I have never failed to make payment of my contract but i am not going to stand by and be ****** with my eyes open. I'm not paying for something that i don't know. The lady i spoke to hinted that when i bought the device 2 yrs ago it was on promotion and now that the 2 yrs are gone the money that was subtracted is added back to the invoice... Hello if it was not on promo i was NOT GOING TO BUY IT. And you just add without consulting me or with no fair warning... I even requested cancellations of the expired numbers but because they are robbing me they keep them on!