I feel disappointed that my friend still hasn’t thanked me for my Christmas present?

I sent her a £20 gift voucher through the post by recorded delivery, which had my name and address on the back of the envelope (so I know she got it). I’ve yet to be thanked. I wrote her a note and aked her if she received it and it’s been blanked. I know she’s at home (as her light’s are on). I rang her just to see how she was doing soon after New Year and all I got was a load of tales of woe from her and she didn’t even ask about me, nor mention my present or note.