No your account is safe or, better, if you still have the private key of the account you are interested in, your money and your account are safe. You are definitively able to recover them using some other wallet. I use CIPHER on iOS and it is ok. On the other side, simply add a new account in metamask giving the private key when asked for it. Nothing more.
after the comment
Sorry, I did not realize that you do not have the private key. I can suggest you to do the following: install Ganache windows or Mac version (google “Truffle Ganache”).Put in its account menu the seed phrase you have. This will create 10 address for you from the phrase. The first should coincide with the first created by metamask.
Add one by one those address in metamask: in Ganache you will have the private key of each address available.
If this way you do not succeed and you do not have a private key for the relevant address, it is lost forever.