why has your quality gone backwards

HI I'm a worker in clothing retail I had defy stove for 27 years no problem.... it was fading & paint chips so I asked my husband to buy me a new stove & I like the black 1 he agreed & I got a defy frridge/freezer & a chest freezer no problem.... the new stove is a headache 1st the oven door glass was loose & water steam from oven when roasting drops into warmer drawer a technician came & changed the door the steaming got worse my husband contacted defy 2 technician2 came & said it is the rubber and my said to me guys dont know what they talking about .... they changed the rubber & it got even worse.... now he complained again & he sent pictures of the problem.... now the at defy wants to bring a chicken to roast and see for himself. my husband is 62 years old & semi crippled & my 1 grandson is staying with us to help him to go around otherwise he stay in bed cause I scared he will hurt himself defy guys want to visit my house all the time with covid so bad just change the stove instead of assuming this then that until warranty expires so change the stove and stop assuming problem coz stove clearly got a problem now I want some higher authority to ph my husband coz you'll are stuffing around o yes if the want to bring his chicken then I'll phone him a day b4 I'm off & but must be from wollies & marinated I'm tired of unprofessional personal