Unhelpful staff and problem going on for a month now

My washing machine is under warranty and i need a technician to come and look at it, i am aware proof of purchase is needed however my parents bought it as a gift and have the receipt and my parents are currently in the UK as my grandmother passed away. i spoke to customer care, head office and cedar square branch where the machine was bought, all said head office would be able to send me a proof of purchase if i provide them with card number it was bought with and the date of purchase which i have done. since then no feedback whatsoever with regards to helping me with proof of purchase, when queried with customer care i had somebody with a terrible attitude tell me twice theres nothing they can do and i need to provide the proof of purchase - i dont appreciate being met with rude and unhelpful attitude when im politely asking to follow up on any luck with sending me a copy of proof of purchase, so much for customer care line. i am now sitting for a month without a washing machine and its very clear the staff are very unwilling to help with the situation. Pathetic service.