Appliances not working

We purchase a whirlpool washing machine and tumble dryer, as well as a gold air gas stove and fridge from meadowdale early February this year. The products were only installed in April as the kitchen wS being redone. In June the Tumble dryer started playing up. Whirlpool had no technicians who actually knew the machine. So after 4 failed attempts at repairs they advised us on 1 October that the tumble dryer would be replaced with 10-14 Working days. Day 16 today, still no new machine and no authorisation had been given to replace it as yet, although they have given us a reference number for the replacement. The gold air 5 plate Gass stove was installed on the 23 April. On Thursday lady week 2 of the plates stopped working altogether and the other 3 fire up but don't stay on. Now please for the amount of money we spent on these appliances surely they should work longer th n 6 months. A message was sent on your Website over the weekend ad ad yeg wd have not received even co formation you received our complaint. As we have no plates wd cannot even boil porridge for two growing boys for breakfast. Totally shock g that this type of appliance is not worth the money spent