The poorest service received ever

I have just received the most disappointed service ever. There is a cheque that is deposit into my husband account and we even had a letter From Absa bank but still we need to hear that the clearance of a normal cheque will take fifteen working days and that the bank will not be possible to assist us at all, now how would you like to keep us as a satisfied customer if there is a big amount to be payable into his account in the next few weeks. He will be receiving his trust payment from his grand father but we need to stay loyal customer after you even do not want to assist us with a clearance of a cheque. I will rather go back to my old bank and build a better relationship with them due to the fact that you do not want to assist us in this matter.