Bad client service

I bought a stove from Game canal walk last year November , I lost my receipt , the stove stopped working and I had to call the stores to organize the agent because I still have guarantee on it , I phone the call center and was told I had to go to the store for a reprint , I went filled some form that I could have gone to any game store to fill in but Nooo I had to go this specific store. The form had to be sent to their head office 19/09/2020 which didn’t happen until this I phoned the store on the 22nd to check for feedback , still have not received the receipt 7 days later , a simple reprint is taking forever and I’m sitting without a stove for 3 weeks now. Complaints department I called and they promised to call me back and I’m still waiting on the call back