New contract

I have 2 lines currently with telkom mobile which is on my business name I have app**** on 16 February 2016 for a new line which is a laptop R380 per month. Friday the 19th Feb i was told it was approved they are just waiting for stock of the modem, then was told by Nomsa at Southgate on Monday 22 February that I need to pay R344.02 to telkom then i could receive my laptop which was then paid and I emailed her the proof of payment then after that payment was made I got a call saying I must pay a deposit of R4500, which makes no sense as my account is up to date & who pays a R4500 deposit for a contract that is R380. Telkom back office has been giving us endless issues. We struggled for 2 weeks on upgrading our cellphones yet we are clients for the past 2 years, now we have this problem. They are quick to bill us exorbitant fees but slow to deliver.