Business Account Frustration

I opened a business account at Tymebank end of last year and have been very happy with their POS App that the client can use. They just tap on your phone and next day the money is in your account. I work for myself so am dependant on the money to buy stock. A client, that is well known to me, paid me R3500 for a job with her card and pin. It was approved and a hold placed on the money. So I call the call centre and they say wait 48 hours. It is now 72 hours and they logged a query which takes 5 days. So I can't pay for stock. I assume they think it's a ***** so blocked it. Now if you don't have branches, your call centre must be highly trained to answer a simple question like why is there a hold on the money. If I knew it was going to happen I would have told the lady to do a transfer to me. I will never again pay a bigger amount into this account. Unbelievable. So the call centre is just pushing queries all over and saying wait 5 days. So just be wary if you open a business account they block amounts clients pay you and no one can say why. I am assuming they think it's a ***** but I personally know the client. I don't have money to run my business so this account will not be used for any bigger amounts ever again.