How can I stop blockhain from changing my wallet ID after every time I receive bitcoins.
Sounds like a question for the
beginners and help section. You can move it to there using the link in the lower left of your screen.
Also, you need to add more detail. What you are describing doesn't sound probable.
He:s in the right section for web wallets.
I think he must be talking about how the new blockchain wallet now automatically will generate a new address once his previous address receives a transaction. It's called an HD wallet. I don't know if there is an option to just operate with a single address wallet but just to make it clear, even when your wallet address is changing, you can still receive bitcoins from the previous wallet that you have before it regenerates a new one.