Dawson's small engine repair charged for 2 items - sent one -refuses to send 2nd item or refund money Pottsville, Pennsylvania

Ordered 2 airfilters for a chainsaw.  amount for 2 was charged to my visa account.  package arrrived with only 1 airfilter in it.  sent email requesting other airfilter be sent or refund the $9.95 price plus the addition $6 shipping above what was marked on the package.  I have sent 4 emails requesting some kind of answer or action.  The only time I heard from them was when I emailed that I had written a comment about them on pissedoff consumer.  They wrote a response that they had never gotten any emails from me.  strange - they must have just randomly checked pissedoffconsumer and found my message.  I resent them the 4 emails and told them my next comment was here and with the better business bureau.  seems like a lot of work just to scam me out of $16 but after their response(none) I'm sure the outcome would have been the same if it had been 2 - $1000 items.