Poor service from Hisense

I given a chance l would rate Hisense a -0,l wish Hisense can take its customers serious.. since last of last week we have been waiting for their technician to come and we dont even know if the techician will come to fix it or will yell us to wait for a certqin part to arrive.whats frustrating ks when we bought the washing machine there was a warranty and with warannty any faulty thing you contact the brand and they attend to our query ASAP but iys a dif story with Hisense.We are using our airtime to call them but still they say they cant get hold of their technician,so why cant they assign a dif technician???2 weeks is a lot from being told to wait for a technician