[DF]

I work in marketing and design logos. If this went to court, you would not win. Change it.

If you want to TRY and fight them then you can register your mark with the copyright office and get assigned a TM. Then you have to use it EVERY TIME you print the logo. You could then say you trade marked it first. They will come back with how long they have been using the mark in the market place and the judge will decide. However I am not sure this is worth a $40 logo. The problem with cheap logos is they often take existing art work and use it again. The problem is when that existing artwork already exists in the same market place.