Groupon.com review: Shrek adventure voucher not working

I complained as my voucher did not work and the merchant gave me a signed document (see attached). I had to buy another ticket (see receipt attached) so I am claiming the £90 back.

You investigated the issue with your voucher for the Standard Experience at Shrek's Adventure London.

You claim to have reached out directly to the merchant's ticketing management team regarding my report that the code was showing as already redeemed and lacked a scannable barcode at the venue. They have reviewed the booking transmission in their system and confirmed that the ticketing link is active and valid. However, the evidence that I have provided shows otherwise and this is signed by Martin.

I want to get my funds back.

I also want to know how I can raise this further.

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