My mtn app is logging in another number when I log in my own number

I downloaded my MTN app and when I logged in I discovered that the email address is not mine. Please how can I change this email address to mine?

Invalid mtn number, NIN, Roaming, My Mtn Nig...

MyMTN app is always showing another person number any time I log in

I've been trying to log into my MTN app for the past week now and I haven't been able to login please fix this my number is 08146322863