Anyone able to change mortgage providers!

Hi,
I’m stuck with PTSB terrible interest rates at the moment. Just came off a fixed period & was offered variable rate 4.15%, 2years fixed 5.2%... and they hit the 6% rates for fixing for longer!
I’m hoping to change mortgage providers but we are in negative equity (20k)...
What are the chances?

Simple answer is No, your in negative equity so no other bank will consider you unless you can make up the difference in LTV with cash.