Terrible equipment and service

<p>I purchased a sub and a amplifier from one of the retail stores targa supplies, the sub lasted 20 minutes and blew, I went back to the retail where I had it professionally installed was advised that they gave no guarantee on subs. I left it there. The amp worked after purchasing another sub 2 weeks down the line the amp started giving me problems. I was then told to visit the supplier for western cape for targa audio Audio legends , amp was sent it for repairs, lasted another 2 weeks had issues once again. After the 3rd time visiting this supplier with a faulty amp still under guarantee I had no replacements just repairs to be faulty once again. It cost me more to visit the place to take the amp for repairs than the retail price of the amp. What do I do moving forward as I have all the receipts besides the petrol I have spent? How can a supplier for a brand be this unprofessional ?</p>