Bad service

I called cell c to change my banking details, thankfully they did that for me. Now the problem is I was told they'll only be able to debit next month, I asked the consultant for banking details so I can do direct deposit, she did gave me the details and told me I have to do that 5days before the debit order date. When I tried doing an eft the messag came out saying invalid account. I then emailed cell c and they rep**** saying one of their agents will call me. Still waiting.