Thanks for your patience.
I can confirm that UK Visa and Immigration Services is the trading name of a company called:
UK VISA SPECIALISTS LIMITED
NEWLAND HOUSE 4TH FLOOR 137-139 HAGLEY ROAD
Company No. 07221022
The company is trading in England and is registered with Companies House.
The head of the immigration team is Mr. Ash Shadat.
The company is registered with the Office of the Immigration Services Commissioner to give immigration advice.
The only telephone number I could find for them is 0800(NNN) NNN-NNNN
The complaints department e-mail address is:[email protected]
If you are unhappy about the service you can also complain to the OISC: www.oisc.gov.uk or write to OISC, Complaints Team, 5th Floor, Counting House,XXXXX London, SE1-2QN. The telephone contact for such a complaint is as follows:- 0845(NNN) NNN-NNNN
So for all intents and purposes this appears to be a properly registered company to give immigration advice. Why nobody is answering your calls or assisting you is beyond me.