Our lesson learned

Salesman came to house newly bought, gave a spectacular presentation with water and food coloring. After an hour of insisting we could not afford it, he finally got us to take a 3 day trial. Salesman said to call him and he would cancel product by the third day otherwise we would be obligated to pay for it. Call the guy day before time was up and he gave us the run around, saying someone will be there to pick it up on a certain day at a certain time, no one came and finally the saleman said to us we have to send in paperwork to cancel product by third day, was too late for us mail man picked up mail from mail box already and the paperwork was postmarked one day late. Now we are stuck with a bill for $4900. Manager in office was very rude, hanging up phone and insulting. Don't fall for presentation, Our lesson learned.