Sorry to hear that you have had such a bad experience, yours is not a rare experience unfortunately.
You should be entitled to some sort of compensation, assuming you had the 200,000 euros in a current account over in Spain, you could have expected to earn about 3% you may have to pay tax on that, but assuming 3% net, also the fact that they have had your money for 2 and a half months, they have made somewhere in the region of 1,250 euros from your money, not bad really.
I am certain you will have to make some sort of complaint, you would need to "denounce" the lawyer and for that you may need to use the services of another lawyer, it could be a case of "throwing good money after bad" if you want the details of a fantastic lawyer based in San Javier, send me a PM and I will be happy to provide their details.
No help to you Margaret, however there is a lesson here for all to learn, keep your money in your own account in Spain or the UK, it really can be very quick to transfer money these days, only send the money to the lawyer at the last minute, or even get a bankers draft made payable to the developer, only once you are satisfied that your are going to "complete" and once you have had a firm appointment at the public notary office, the bankers draft will cost a few euros, but nothing like the money that Margaret has lost, or never earned!
Where was your local agent in this instance? This should form part of the aftersales service, I hope this is of some use Margaret.