There's absolutely nothing you can do about those unwanted tokens than to stay away from them. Your wallet address is refer to as the public keys that's visible to all and anyone can send token or coins into your public address with or without your permission. The tokens are not harmful and can not affect the real tokens you have as long as you don't interact with them. The moment you attempt to interact with them and mistakenly grant them access to your funds, that's when it becomes harmful and can steal from your wallet in disguise as gas fees. As far as you stay away from them, you're absolutely safe.
If you did not work for it, then you have no reason to attempt to sell it. Nobody is sharing free coins as you use to see in the internet. It's attempt to lure you and fall for their tricks. Any questionable coins in your wallet should be ignored.