Click on the Extension icon on the browser, click on Unisat extension icon, and you will be given a small window. At the left of the small drop down window, you will see like HDwallet #1, click on it and you will see another window, on top there is a Switch wallet and + icon.
Click on + icon, and you will have many options for switching wallet like
Restore from mnemonnics (12-words, 24-words).
Restore from single private key.
Gosh! Thank you, I just followed the instructions and it went smoothly. I had to remove the initial wrong address but isn't more better to simplify the whole process. That option should have been included from the beginning when registering on the platform thou.
Yeah, everything is fine now and I'm able to use my former wallet. Thanks to hd49728 for the clarification.