Sounds like you bought Sliver for the wrong game. You will need to contact the platform you play on for a possible refund. Sliver cannot be transferred.
https://help.bungie.net/hc/en-us/articles/360049497091-Destiny-Silver-Purchases-Guide
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It said D2 when I was buying it in my PS5 when I was in D2....it only shows that I did one purchase of $20 dollar silver when I did 2 and 1 $5 dollar silver that night.....I have been in contact with Bungie about this before....