Fail to honour warranty

I bought cash a touched screen eletric stove from Game, its a Defy appliance, andi it had a 1 year warranty and they said if i want to extend the warranty to five years i must pay R400 and i did, it happened that in 2022 the stove have a fault and they and they came and fix it , in April 2023 it has another fault and since April 2023 the technicians came and they fail to fix the stove because it works only for that day , i called and report to them, after a long wait of calling and asking , another technician came and this time the stove has break the top because when the stove main switch is on the stove plates turn red all of them, the technician who came in my house said the stove is very dangerous now , they are supposed to send a report to their superiors because they are failing to fix it, they say we must wait for the call from the suppliers, and they didn't call am the one who call Game services and asked for the feedback they promised to call in 24- 48hrs of which they didn't, and on the 18July 2023 i called and asked what is happening and they said the headoffice is atill waiting for the report from the technicians and i asked them why they didn't asked the report for themselves.19 July 2023 they called my daughter and asked for email adress so as to send the quotation to us because they cant fix the stove, they said the fault is due to ****roaches, wheereas their warranty did say anything about ****roaches, i just want a new stove from Game