Decorland Game City gone silent about my order

I ordered blinds from Decorland Game City and the order was finalised on the 8th of November. I was told it takes about 3 weeks and I did not have a problem with that. On the 30th of November I was informed that my order was ready and I must pay the balance which I paid by EFT on the 6th December. I requested that the installation be done on the 14th or 15th December when the painting was finished. On Tuesday 15th I received a call from Decorland Game City stating that my payment was still not showing. When I sent the proof of payment I was told it’s “false information” because it was showing a negative amount. It took me the whole morning to explain to the salesperson that of course it had to be negative because the proof was showing money coming out of my account, basic accounting!!! Eventually she understood but still I was not getting an answer as to when the fitting would be done. I have been calling everyday since then and I’m told head office will contact me. All I need is confirmation of when they will be coming so that I make arrangements because I am not home, I have to go to work. If they cant finish the job they must just say so and pay back my money and I’ll go buy elsewhere.