I’ve accidentally signed into the wrong Facebook account. How do I switch?
Tinder is logging into the wrong Facebook. : Tinder
Tinder Something Went Wrong Please Login To This App Again To Reconnect Your Facebook Account Quick and Easy Solution
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When I Connect Tinder to Facebook, Does It Show on Facebook?
However before I was able to report this profile it disappeared from my match list.
If you are unable to update your birthday, you likely updated it recently and Facebook is preventing you from changing it for a while.
The problem with this that this used to be an accepted behavior from Tinder.
If you both promised to drop the app and remain exclusive then there are some things that need discussing but cheating may not necessarily be one of them.
Finally, you can try using the official Tinder if none of the solutions for the app work.