wrong address - registered with SF Wales

Hi

I've started the application process for a PG loan, but when asked to enter my postcode, I couldn't find my address on the list (i was given an option to choose a flat number, but not the building). Scared that my post would get lost/end up in another building, I entered an address where I previously lived briefly and where my partner still lives - in Wales. So I automatically got registered with student finance Wales. Is there any way to change this? I am an EU national, I've lived in England for 3 years, except for a brief period of time that I spent in Wales, and I will be going to uni in England. Is there any way to change to student finance England? I tried registering again but it won't let me. Does it even matter, or shall I just stay with Wales, even if I live in England?

Thank you