Frankly, this sounds like a foolproof recipe to be scammed.
You should provide more details to allow a better assessment of your problem.
Is this your own Bitcoin wallet?
What particular Bitcoin wallet is it? (E.g. Bitcoin Core, Electrum, Sparrow, ...)
What is the exact problem why you can't access that wallet?
Did you forget the encryption password/passphrase of your wallet?
Did you buy this wallet from someone and it fools you for a (usually faked) Bitcoin treasure?
So many questions, so little details from you, initially.