HiJacked Domain

Hullo all, hope you can help.  I have a dot com domain registered with a company called uk2 in London, England where the service provided by this company is awful.  In the past I have tried to move the domain from this company by writing letter and sending emails.  All my attempts to contact them have been ignored.  In April of this year I received a renewal notification from a so call company (Domain Registry of America) who lead me to believe that they were taking over my registered domain.  This seem idea at the time due to the bad service offered by UK2 in London.  

Two weeks ago I logged onto www.droa.com this being the website for Domain Registry of America where I renewed my domain registration as it had become due on the 22nd July of this year.  I renewed for 5 years.

I have not hear anything from Domain Registry of America since and became suspicious as to what was going on.  I have now done some investigation on this company and find it to be a scam.

I am concern about the renewal of this domain and a check on my credit card shows that payment has gone though thought a date for the next renewal is still showing as July of this year.

I have 2 web hosting accounts with hosting matters and now wish to renew the dot com domain with hosting matters as the service offered here is second to none.  However, the situation I am in seems that I can'r get access to the domain either through uk2 in England or Domain Registry of America.

Can anyone help me as to what to do especially when I am unable to get any cooperation from the uk company or Domain Registry of America.  Further, am I likely to loose the said domain.

Thanks in advance for any help provided.

Jezella