Vouchers bought

Bought a voucher in 2023 which is/ was valid for three years according to to the voucher. Proof of payment is available. However when I called they said it’s expired. Then when I refer them to the rules. We told they will call head office and get back to us. That’s been last week. Shame. Always enjoyed their service and it’s sad that this is going to make me stay away as well as all my referrals. And im not even from Dbn. But make the drive coz their service used to be excellent. Please don’t buy vouchers especially if in special.