Surname on flight booking is the city I’m from, not my actual surname

We are due to fly to Italy with RyanAir through Loveholidays tomorrow and the name on my flight booking is “Sandra Manchester” instead of “Sandra (Actual Surname)”.

I know for a fact I did not put my city as my surname.

Has anyone else dealt with anything like this?

does anyone know if I’ll be able to change it at the desk?