elmos learning cadventure charged for a returned item montoursville , Pennsylvania

i ordered elmos learning adventure for my grandchild.it was ok but i kept the initial 3.47 promo package. when the swecond one arrived the price was 33,00 sent it back in 2 weeks.they couldn't find receivership of it at first, then i got a collection agency after me for 43.10 includes late fee. even thhough i sent it back.i called and paid it directly to the company not collection agency.he said was late being sent back and even though they had received the shipment.i was told i was charged for it because it was not returned within 10 days.