After sales service

I have had Future POS from HRK for nearly two years now and have had very few issues. Now that I need their help all the problems arise. Last week took them 4 days just to re-install software. Since the software was finally re-installed some minor problems have come up and since Saturday the 15th when I informed them until today (Thursday 19th Feb) still the problems have not been rectified. Been pushed from one person to the next, never letting me know what is happening, no updates, no return phone calls. I cannot run a business like this when we depend on the pos and the back office software.