Not allocating payments, not adhering to 7-10 working days, not delivering correct items

I ordered and paid for items in store. The branch said that as soon as the payment cleared, I would receive an invoice via mail and the items would be ordered. Four days after the payment I had not received anything, so I contacted them. They said the payment was not yet allocated. The branch had to phone around to get the payment allocated so that the items could be ordered. They phoned me today, confirming the stock had arrived, and phone me again after 10 minutes and said the items received was not what was ordered. So now I have to wait another week at the least so that the correct items can be dispatched and delivered to the branch. They definitely do not stick to their supposed 7 - 10 working days. I have never dealt with such an *********** supplier. I will never again order anything from Essops.