Invalid applicatiikn even biometric done.

[AdeBrite]

Hello there, I am looking for advice from anyone with experience or a similar situation like myself

I recently made an application (Further Leave to Remain 10 year route [Partner]). I also included details of my little girl who was only like 90 days in March. Initially I received an email saying that my application has been received and will take 6 mths. Later on I got a letter in March for biometric data and enrolled my biometrics at the post office. However in June I received a letter telling me to attend a reporting event somewhere in the Midlands and this got me very worried. Any advise/suggestions please?

My previous circumstances include a student visa (expired 2013), previous EU application that was unsuccessful (2014) and I basically think that implied overstaying. Looking forward to hear from everyone please