Square cash is essentially a credit card payment and as a result it is a bad idea to accept it from anyone who does not have large amounts of preexisting trust and reputation as otherwise you are almost guaranteed to get a chargeback.

My advise is to withdraw to your bank account and then use that cash to buy BTC with cash.....unless of course thee is a reason why you do not want to withdraw to your bank account

No, didnt redeem any deposit bonus. After making withdrawal request, it was deducted from my account balance. 

Still havent received my withdrawal.

Have you received any deposit bonuses and meet the wagering requirement before making the withdrawal request? AFAIK you will not able to withdraw all your balance if you received the deposit bonus but have not completed the wagering requirement yet.