TFG HAS THE WORST CUSTOMER SERVICE!!!

I bought an egift card on the 20/08/2023. I tried using it both instore and online but I kept getting error "invalid voucher", I was advised by the consultant to use the store account and have that voucher cancelled and corrected back to my account. I was given reference SR-417929 for the cancellation. After a month of calling and countless emails with no feedback, I decided to go the sportscene store to enquire about the case and to my surprise I was told a different story and this is after a month of the back and forth. This is my first month with TFG and honestly I wanna settle and cancel the account because not only are their stuff useless. The whole process has been a nightmare to have this resolved. I DO NOT NEED THE VOUCHER ANYMORE AND NO ONE CAN TELL ME WHAT HAPPENED TO T SINCE IT WAS THEIR SYSTEM THAT GAVE AN ERROR INVALID WHEN I TRIED USING THE VOUCHER. I ALSO TRIED USING IT ON THE STORE ON THE 23/08/2023 AND GAVE THEIR CONSULTANT THE SAME ERROR. TFG IS THE WORST AND I ADVICE ANYONE TO NEVER USE THEM. MY FIRST EXPERIENCE WITH THEM HAS BEEN A NIGHTMARE AND I REGRET EVER OPENING AN ACCOUNT WITH THEM.