I can't access the microsoft account that is linked with my playstation account and now I...

I linked my old Microsoft account with my PlayStation account a few years ago and I now don’t have access to the account, I can’t link a new account with my PS account as I don’t know the password and the phone number listed on there is my old one - help would be appreciated

Even if you could unlink the account you wouldnt be able to link a different one.

Per https://help.minecraft.net/hc/en-us/articles/360037725571-Minecraft-for-PlayStation-FAQ

Note: Once a Microsoft account has been linked to a PlayStation® account, neither the Microsoft account nor the PlayStation™ Network account can be associated with a different account. 

If you choose to unlink accounts, then purchases will be returned to the account which made the purchase. Even after unlinking, Microsoft and PlayStation® accounts can only be re-linked to the original account.

I have to full error msg now, I'm able to login to Microsoft on any other device but not PS4 for some reason,

"Oops! Looks like the Microsoft account you are trying to use is already connected to another account on the "PlayStation Network"

Please sign in with a Microsoft account that is not already linked on

"PlayStation Network""

Is the error msg, I can't login with another because this is my only Microsoft account and idk how to logout with this one on playstation without knowing where it is logged into.

I linked my Microsoft account with my father's PSN account when I was younger because I didn't have one of my own and I wanted to play games like Minecraft and such with friends online. Now that I'm a bit older, I was hoping I would be able to link my Microsoft account with my personal PSN account, but I can't get in contact with technical support from either Sony or Microsoft as they just throw poorly programmed bots my way that don't answer my questions. I can't even find the instructions to unlink my Microsoft account from my father's PSN account to begin with.

Can someone help with this? And if it can't be done, can someone at least explain why?

The short answer is no. Its not possible.

The long answer is:

LINKING A MICROSOFT ACCOUNT TO A PLAYSTATION® ACCOUNT

Note: Once a Microsoft account has been linked to a PlayStation® account, neither the Microsoft account nor the PlayStation™ Network account can be associated with a different account. 

If you choose to unlink accounts, then purchases will be returned to the account which made the purchase. Even after unlinking, Microsoft and PlayStation® accounts can only be re-linked to the original account.

Source: https://help.minecraft.net/hc/en-us/articles/360037725571#h_01FANTJMTM2689F8H1VA2F559Y

Thank you for the reply. Does that mean that if my Microsoft account is linked to a PlayStation account it will appear on this page?

There's nothing there anyway, which I think confirms that my Microsoft account is not linked to a PlayStation account.

Hi, I hope you're doing great out there. I am an Independent advisor and I am here to help you in regard to your concern.

If I may ask, what is the exact issue or error that you're getting whenever you're trying to link your account to Minecraft on your PlayStation console?