Promises that are not kept

An order was placed for roller shutters to the amount of about R50 000 beginning of March 2015. The agreement was that should we do a 100% payment, the installation will take place in two weeks time. The full amount was paid the next day. Surprise!! The project is not completed, no one is responsible. It is not possible to speak to a responsible person, no sensible feedback is given on time as promised. The supplier can clearly not be trusted and please stay away from them. Rather pay more and get the agreed service or use someone else. This is a faceless non-trustworthy organisation. I have never experienced such bad service from a commercial supplier.