Online order- 11days and NOTHING!!!

I placed an order online, not cheap significant amount, and paid immediately. That was Sunday, 19 May. Started querying with Customer Care on eM why order still shows awaiting payment 3days later. NO response on eM. I called and was advised to eM proof of payment. 2 days later no response. Call again "they don't know" (really????) Someone will call me back. That was this Sat. As expected no one called me back. Sunday i wrote a rather stern eM to CC demanding someone to respond to me. Finally got an anwer back on an eM that was irrelevant and ignored the 3 eMails after that. So after having to be rude i finally got that they have problems with Pay U and that is the delay. It is now 11days later, and there is no movement on my order. A call has been logged. Why is this MY problem- i have paid, send proof of it?? Terrible service from customer care- gets you no where. Cannot escalate it anywhere! I paid the same day- and 11 days has gone, with some of the stuff needed immediately. So much for shopping CONVENIENTLY online. Never again. And my money is not traceable to them- system fails on their side and it is MY problem now. I am fed up. Will never support them again.