Similar thing happened to me for which i will be posting a complaint.

On April 24 '10, I placed an online order for $60.99 from 1800petmeds. On April 27 '10, I called to confirm that the prescription was authorized and ready to ship, and to upgrade my shipping to Priority for an additional $3.99. Instead of charging me the $3.99 shipping charge, they charged me $64.99 which is the $60.99 I originally paid PLUS the $3.99. Meaning, my account then had two back to back charges, one for original $60.99 and then another for $64.98! If they had done their jobs correctly, it should have been one charge for $60.99 and then the one for $3.99 shipping.

When I noticed this within hours I called 1800petmeds and spoke with a certain customer rep. I told him that this DOUBLE CHARGE was endangering my count of being overdrawn and that they needed to fix it immediately. He AGREED with me that a MISTAKE was made (after some teeth pulling because this guy did NOT want to admit that they messed up), took my bank's phone number, my bank card number, and told me he would call my bank, take care of it, and call me right back. He called me back in a 1/2 hour to report that it was fixed. So I breathed a sigh of relief. Until two days later when my bank account was hit with TWO OVERDRAFT CHARGES TOTALING $72 as a DIRECT result of their mistake. After nearly 40 minutes on the phone with my bank I was able to explain to them, and they were able to clearly see, that this was all caused by 1800petmeds UNAUTHORIZED charge of $64.98. So now I had to have my credit card cancelled and wait for a reissue, have to file a claim with my bank in order for them to investigate and for me to be compensated for the overdraft fees. Not to mention, this whole fiasco has eaten up 50 minutes of my cell phone time (i do not use a land line) putting me in jeopardy of accruing MORE CHARGES for going over my minutes. All thanks to the ineptitude of 1800petmeds. Would rather pay more through my vet than ever use them again. The pits!