Hi there and welcome
To check, this issue is for your Gmail account correct? Just want to first confirm this please.
What you will want to do is enable 2 step verification.
This will stop anyone accessing your account unless they have access to your cell phone, so it is very secure.
To do this use my link below
Click on Get Started and follow the steps to complete this. This will stop any other people accessing your account
I can also do these steps for you, and have made a request via Additional Services. This is optional, and if you choose to do this, I can, with your permission, remote into your computer while you watch and do all these steps (and deal with any problems that arise during them) for you. Or if you do not choose to take this service, we can continue here. This is no problem at all. Just let me know please.
Else let me know please how you go
ok, what I did was give you a set of instructions to secure your account first, so we can do this.
Then we can move to removing the strange account that someone added to your iPad.
You're saying you do not wish to secure your account?
I know the steps to do the iPad on, and can tell you this
We only have one more step, on the iPad, go to Settings, Mail, press on the strange email account, then press delete account and it is then gone
Then you are done.
If you have any problems, or would like any additional information or assistance, please do not hesitate to let me know.
Else if you can take a second to rate my service by clicking one of the stars at the top of the screen then submit, that would be greatly appreciated.