Very poor service

My Laptop required repairs, I obtained a quote from Matrix Bellville. I had to pay for the part and waited 4 weeks for the part to arrive. They did not contact me to inform that the part arrived I phoned to enquire. I handed in the laptop on Monday 14th and on numerous occasions contacted them to enquire about the status. Not in one instance did they call me. Eventually they confirmed that the laptop will be ready for collection on Tuesday 22nd @ 14h00 I arrived @ 13h45 only to be informed that the driver / manager are still an half hour away. I waited outside in my vehicle and noticed the driver / manager arrived at 14h15. I waited for their call but received none, thus I went inside @ 14h40 to enquire where my laptop are. I was then informed that the manager only arrived now, they did not know I was sitting outside and knew the time he arrived. Please people before you even think of going to Matrix rather explore other computer companies as Matrix are not on standard at all. I have been without my resource that provide an income to me for more than a month. They did not even offer any other support or assistance.