Wallmart Pharmacy charged me $30 to fill a script that should have been $10 for a 90 day supply bentonville Arkansas

Loratadine is a script to stop mild alergies and runny noses. The pharmacist told me he would substitute Claritan. i turned down Claritan and told him I wanted Loratadine. He said he would fill it and charged me $30 for a 90 day supply. i called the corporate headquqrters to complain about it and told them I researched both products on the internet and Loratadine is rated as very satisfied while Claritan is only moderately satisfied as reported by users. i was told I would receive a reply in four days. Never heard back. I called today and was told it went to the wrong person so I told then the story again to a different person. They told me I would get a call in 4 days. they kept misstating the problem that I said I was having. I began to see a pattern developing. In 4 days, I believe, I was going to get the run around again so I contacted Rip Off Report.