Yes, your lawyer is right, nothing can be done.

That's why it is always advisable not to put joint name in property ownership. If one disagree to sell the property and reluctantly to sign on whatever reason, the other party simply can't do anything about it. In this kind of situation, the property is as good as a stone.

Even for husband and wife, it is advisable to put under wife name or husband name, don't put joint name. As if one passed away without will or any other reasons, the property need to go through a lot of documentation before it can be sold or transferred. I know people feel secure to put in joint name but there are a lot of troublesome consequences afterwards if something goes wrong afterwards be it divorced, death etc.

Actually if think ahead or properly, it is not as secure as people think to put joint name as well. Just like TS case, even you own half of the property, but the other party reluctant to compromise or agree on you to sign, then owning half of the properties is as same as owning nothing, because the properties is totally useless without the other half signature.

That's why it is advisable to put one name only. If it is husband and wife, then the others party can put a will to transfer the ownership afterwards, much better.

Summarise, if something goes wrong under joint name, it could be troublesome afterwards.

That's why it is advisable to put one name only.

For couple or husband and wife that want to buy house,

Buy the house, either put you name or your girl friend name only.

Your name, you service the loan, ok, break up, no afterwards problem.

Girl friend name, your girl friend service the loan, may be actually you are paying the money, break up, then your girl friend need to service the loan, not you.
Although previously loan paid by you down to the drain. But it is much much better the stuck in between with no solution while still need to service the loan just like TS case.

Sell the house would be the better solution even at a loss.

Still it requires her signature. Give her some money to sign on it, then settle the case rather than no solution.

Never ever purchase anything with joint name.

At least now she offered you the solution.

It is a good opportunity window for you to get out the messy situation of stuck in between.

Then prey hard the rest 3 quarter won't be like TS case.