Hi
Suggest you write back from your hotmail account and say, oh very sorry to see that you had trademark. Happy to consider a transfer for adminstrative costs and await their response, when the reply comes in tell them it will be £ 500 plus they pay the nominet fees and settle for any offer over £ 300.00. Perphaps point out htis will be quicker and more cost effective than other options.
Just a suggestion !!
JohnP