|Sorry you're having an issue. We had a couple lots of stickers in the last batch that did this and you may have gotten overrun from that lot.
1. coax the edge off the backing with a razor blade and see if it peels with the tape
2. if the tape is just not sticking at all, carefully remove the tape from the sticker and backing and replace it with a couple runs of regular scotch tape. All you need to do is lift the sticker off the backing.
If it's just a mess you don't want to deal with (I get it, it's 2020 after all), send me an email and we'll get things sorted out for you.