Dar Waterfront & Associates Demand for Payment Sherman Oaks California

I received a letter from Dar Waterfront & Associates printed on pink paper.  They are demanding a total of $106.00.

The charges are $54.50 for Brio day and night serum and $51.50 for Allegro anti-aging cream.  I remember selecting an item, but don't remember the name, and being told it was free and I just had to pay freight.  I never received an invoice stating I owed them anything from these companies.

Dar Waterfront stated the IP address which was supposed to be mine, but I checked my computer and it is incorrect.  Also stated it was on 2/11/2017, which was a Saturday.  I don't check my email that late in the day, only first thing in the morning.  Also the credit card ending they gave me was not mine, and that it was a VISA card.  I do not remember which card I used to pay for the freight (I have 2 credit cards).

I am a senior and I am on a fixed income and this charge would make it hard for me to pay.  They also said I had 30 days to file a letter of dispute, which I will do.