First, use What to do after you change your Apple ID or password https://support.apple.com/en-us/HT204071
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And, does your problem arise when updating apps. Then, this could be your problem.
What to do when the Mac App Store shows a different Apple ID for software updates https://www.macworld.com/article/3267709/mac-app-store-apple-id.html. This document refers to a prior owner, but is also applies to cases where a current owner's old Apple ID is the problem.
Basically, If an app is purchased/downloaded using one Apple ID, then you can't update it with with another Apple ID. The app is inextricably linked to the first Apple ID. You'll have to delete it and repurchase/download it again with the second Apple ID unless you use family sharing (see below).
As an alternative to deletion, you can set up family sharing between the IDs to share purchases made with them. See:
Family Sharing https://support.apple.com/en-us/HT201060
Set up Family Sharing https://support.apple.com/en-us/HT201088
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And, you might be in this unfortunate position, dealing a forgotten new password.
See: If you forgot your Apple ID password https://support.apple.com/en-us/HT201487
You also can use Having trouble signing in/iForgot https://iforgot.apple.com/password/verify/appleid to recover it.
And you will need to see If you forgot the answers to your Apple ID security questions https://support.apple.com/en-us/HT201485
Before trying to answer your security questions is very important that you think about your questions, including your birth date, and their answers carefully and try to recall all details you can. If you don't answer them correctly enough, then you easily can lose control of your account.
I think your account is going to end up being disabled (as you mentioned) if you pursue matters as above. See If your Apple ID is locked or disabled https://support.apple.com/en-us/HT204106
And, thus, you will need to try to recover your account if you want to keep using it. See Recover your Apple ID when you can’t reset your password https://support.apple.com/en-us/HT204921.