As soon as I read that you used the solicitor that Bloor Homes recommended/suggested in return for £2,000 in "extras" (these are always overpriced and poor value anyway) I could see you would have problems delaying legal completion.
You will need to be very firm with "your" solicitor. Tell her that if she does not follow your instructions or advises you to legally complete with your house as it is, you will report her to the Law Society for breaching SRA rules on conflicts of interest. That should get her to sit up.
I expect there is a clause in the sales contract (which you signed at exchange) saying that you must legally complete within two weeks fo the home being finished.
I would also tell your solicitor that you will be getting the local press to cover the story of your brickwork and the antics of your solicitor if you do not get the home you were sold.
It is probably worth getting the photo and story in the press right now!
I've made a start for you
here I would also think you should consider getting an independent solicitor, unrelated and unconnected to Bloor Homes, to represent just your interests and support you.