Getting error on galaxy store using a voucher code

[Decyther74]

Trying to download a watch face on the galaxy store using a code. The code has been accepted and shows in my list of coupons. But when I try to download it I get error code S2000/P/71HGJ every time I try, the last 5 digits change each time. I have cleared the store cache and the Samsung billing cache, restarted my phone (S9) and rebooted my watch (S3F).