Dead power supply is customer fault

ordered a new prepaid data line, that i had to pay prorata on Tuesday 13th August. Got it on Wednesday 21 August. Powered it up at home, after 2 hours!!! the unit went off. After a few hours with the FB support chat, we figured out the power supply died. Took it to the branch as per the Consultant. Branch said they must send it in for repairs, and it can take 2 to 3 weeks for the repairs to be effacted, and i will have to pay if it is found to be customer damage. This is ****** ridiculous! i paid pro rata for the unit, and now i cannot use it! unacceptable