Verimark Vacuum cleaner

I purchased a Verimark vacuum cleaner on the 26th October 2022. I used it for the 1st time on the 5th November (and i remember because it was Guy Fawkes). After a while the vacuum cleaner stopped working. I changed plugs as i thought that might be the problem but it still did not switch on. The body of the vacuum cleaner itself felt very hot. I immediately packed it up in the box but did not get a chance to return it until the 19 November 2022. Upon returning the unit, it was tested & it worked. I explained to the staff that it did work and only switched off after a while of using. They refused to refund me because it was out of the 14 day refund period. It was sent in for repairs. They also explained this that is stated in the booklet which i would never check because the guarantee is usually on a till slip. I called Game on the 7th December 2022 to enquire on the repair but was told it takes 21 days. I never heard back from Game. Today, 29th December 2022, i went into Game to follow up. The vacuum cleaner has been there since 9 December apparently. I was never notified of this. I asked for proof that the sms was indeed sent but none could be provided. I am requesting a refund as per the Game till slip which states "We will have any item under warranty, repaired for you - should it take longer than 21 days, the item will be replaced or refunded" I would like Game to honour that. It may have been repaired & back at the shop but was not in my possession because i was not notified. I have in the interim bought another vacuum cleaner and have no use for this.