Bad service

landlord told me to contact Irwin to fix the oven at the flat that I am renting. They guys can out to see what needs to be replaced 11 days after I contacted them. They informed me that they need to replace the element thermostat and oven switch. They told me that they will send me a quote. Then they told me that they will need to come and take sample so they can get the correct parts. Over a month after I first contacted them they gave me a quote. My land Lord told me they the quote was to high I must get someone else to get a second quote. When the other company arrived they told me that they will need the parts back as they didn't just take the parts but the fittings that will be needed to install the components that are faulty. I have tried several times to contact them to get the parts back but Irwin will not return my calls or reply to me messages. They othere company quoted me less then half. I am still with out an oven since I contacted him on the 13/10/2022