Can't find any relevant advice...

I've searched the net but can't find anything relevant to my situation so thought I'd try here. Problem is I can't be too specific as the other person stalks me online.
I left the marital home 4 years ago, and applied for a divorce 6 month later. My spouse had already moved in a new partner and got engaged. The solicitor I used cited adultery and said it was happening before I left, which it wasn't. It was a mistake, I never said my spouse was having an affair before I left, for some reason the solicitor said they were and it has caused no end of problems. My spouse is refusing to sign on principle. I have sent proof to the courts of the engagement but they have refused it.
Now problem number 2... I moved in with a relative. I went to the mortgage lender with my spouse to have my name taken off the mortgage but they refused them a mortgage on their own. The options are they get a mortgage to take my name off or the house is sold. There is very little equity, hopefully enough to cover fees after the mortgage is paid.
I work part time, and already have my name on another mortgage so there is no chance of me taking on the mortgage. For the last 4 years my spouse has lived in the house and paid the interest only mortgage. I have just received a letter saying the mortgage has not been paid this month.
I can't speak to a solicitor or the mortgage provider until tuesday.

What happens now?

My spouse changed the locks so I can't get into the house.
Do they really think they can live there and not pay anything? I've had no contact from them. I had to get the police involved when my spouse threatened my new partner and they were told to speak to my solicitor in future and not to contact me.

I'm sick with worry. My spouse continues to ruin my life.

Unless someone is prepared to admit to adultery it's difficult to prove. You'd need very pornographic pictures or a child from the relationship.

What's your plans re the divorce now?

Probably a good idea to get hold of your lender ASAP and let them know what is going on.

It's splashed all over Facebook, in a relationship, engaged, living together. That should be enough.

Have to wait until tuesday to speak to anyone because of the bank holiday. The wait is making me more worried and anxious.

Jamie Allan wrote:

It's splashed all over Facebook, in a relationship, engaged, living together. That should be enough.

Not to prove adultery without admission it won't.

You could use it as unreasonable behaviour