You do nothing.
You sent her an unsolicited gift, despite her request you leave her alone.
She responded politely, but clearly not wanting further contact. In case you didn't understand, her one-line response with the "hope you and yours have a happy holiday" is what is called a 'shut out' response. Pursuing further will only embarrass you both.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh