Poor customer service

We bought a Sansui smart TV in January @ incredible connection. What a disappointment. At the end of June we took the tv back because it had a default, they informed us that we cannot get an exchange it has to be repaired and that it will take 21 working days.. This made me angry but we booked the tv in after I asked them not to repair the tv, because once you repair a tv it is never the same again. They phoned me on Tuesday the 28th of July to inform me that the tv is back and repaired... We went to go and collect the tv on Wednesday the 29th got home and connected it. Last night Saturday the 1st of August it malfunctioned again. Took it back today Sunday the 2nd of August and once again they booked the tv in with no help in the sence of they must first phone the supplier tomorrow... For me this is unacceptable as 3 days after we waited for 21 days with no tv we have to sit without a tv again.. This is poor service and since it is not even a year old yet I expected better service form them.. They are not even trying to go the extra mile for a customer. We just have to wait, and the part that made me angry is they did not wait for their money, because the tv was paid in cash.. I will never buy anything from them again.