Square Up Square Takes money from bank account and sits on it for months-, Internet

Square took it upon themselves to retrieve money from my bank account for sales that were processed.  They stated they had received notification of a chargeback from a client.  I had never received any word or correspondance from an unhappy client.  They sat on those funds for several months.
 
After I contacted them again, very upset, they stated the chargeback where they represented me as the seller- did not go in my favor- they kept all the funds plus additional funds that were removed.  Now 2-3 months later they are still sitting on funds for a sale that was processed before I was notified of the chargeback.

 When I requested the money be deposited to me- they stated that they had to keep it against future chargebacks.  Well- there aren't going to be any because I refuse to use their services again.  I just want my money that is due to me. 

If anyone is interested in using their services- B E W A R E!!  They make it easy to process credit card transactions as money for them to keep!!!