Taking my money but refusing to switch my LTE on

I started a contract with telkom mobile in February. the contract i took was the my gig 7.5GB at R359 a month i received my router on the 20th February i was told that my first debit order would go off on the 29 of March. for the amount of R549 which was for one full month and prorata for February. to my surprise on the 29th of march they took R3079 of my banking account! when i phoned them they could not tell me why they could only apologize and admitted that it was there fault. i was then told that i must reverse the debit order and some one from the call centre will call me to confirm the new debit order... no one ever phoned and to my suprise... again! they suspended my account and again i had to call in to try sort it out only to be told very rudely i might add that they will not open my account until payment has been done. i told them then its fine they can keep it suspended till the end of the month and just do a double debit order. I phoned them on the 28th of march to confirm what the amount is that they would debit and they told me R3400! How? now they have taken a debit order of R1050 and are still refusing to to switch my internet back on!