I contacted this org today. They have no record of you ringing them. They state quite strongly they would NEVER say Travellers were not ethnic minorities. As far as they are concerned they are. I asked them about their wording on their web site "ethnic minorities and travellers" They stated, quite correctly, that not all Travellers are ethnic minorities and the 'and' refers to the Travellers they work with that are not ethnic minorities. I have already explained which Travellers are considered EM.
I have also contacted the other number you provided. They are getting back to me as they scan their phone records in regards to someone ringing about Travellers and Ethnic minority status. Seems they keep records not only of the calls but what they were in connection to.
I hope you havent been lying! And only looked at their websites and saw the ubiquitous AND and decided that was enough for you! If that was the case id put that down to mischief making or even trolling and ask you be dealt with for said.
So one down one to go!