Extremelly poor service

i called Whirlpool on 28/02/15 to report my oven and explained that it was out of guarantee, a technician came the same day, checked the oven and took a pic and told me that he is going to look for parts cause the oven was burnt and i paid R399 as a call out fee and labor, that was the last time i saw the techinician. I countlessly had to call the technician or the head office to check how far they are, each time i will be told they are still looking for parts and they will call back which they never did. I do not understand how a big company like whirlpool doesnt have parts for their appliances. Im very dissapointed with their poor service and i would never have bought their appliance had i known that i would be treated badly. What I'm asking is for them to pay me back the labor money, which is included in the call out fee, because i have'nt receive any help from them.