Wost customer service

I bought Samsung microwave at game Rosebank in May 2020. Around February the microwave just went blank not switching on. I went to Game Cresta told them about the issue unfortunately I lost the invoice the lady who was assisting me told me I must take it back to Rosebank they can pull my invoice, told them I work at Cresta I won't get time to go to Rosebank she told me for them to get the invoice it will take up to 4 weeks and another 4 weeks to send to Rosebank told its okay I will wait. She then asked me the get bank statement and model No. Of the microwave and the card No. I used which I did gave her all those details and my contact details it's now over 2 months I am still waiting for them to get my invoice so they can book in my microwave. It was clear from begin that they didn't want to help they could have told me from beginning they won't help me now I am sitting with microwave that is not working waiting like I am stupid