Please could somebody advise me!

I left my home & partner of 9 years due to his bullying behaviour (non violent). I sold my home in the UK which I inherited from my family and moved to Spain 6 years ago.

Both our names are on the Escritura but my ex put very little in the way of cash into buying or renovating the property and even less work.

After I left him he simply abandoned the property which with his agreeance I moved back into as it was infested with rats and mice and they'd caused no end of damage which I repaired at my own cost.

Three years on after offering to buy him out twice at market value he is still calling all the shots and demanding the house be put on the market for less than the market value as he needs the cash but doesn't want to sell to me.

Can he make demands like this?

As his investment was by no means equal do I really have to pay him 50% of the market value?

He also left with a substantial amount of cash and one of our joint accounts which again had a good sum of money in it. Can these sums be taken into account when negotiating a final figure if he agreed to sell to me - they amount to just over 20,000 €?

On another matter (yet related) he also sold my car without my knowledge and it is still registered to me and I have received a tax bill for it which Traffico say I must pay. I have no idea who bought the car and my ex cannot help as it was sold through a third party.

I just want the misery to end and move on - Please if somebody can help I'd be so greatful.