Useless Clicks

I have an ongoing issue with Clicks not accepting my credit card (which every other outlet accepts). I have complained twice on the "customer support" email address with no response and tried to call the customer support number to which I got an automated message, "not available at this time". So how must I flag the issue? I recently loaded my 6 month repeat script but actually want it back so I can use another pharmacy, as EVERY time I go into Clicks there is one issue or another.