Contacted customer service three times about an issue. They never called back, and on...

Contacted customer service three times about an issue. They never called back, and on the third try to talk with them, the representative claims I have a credit at the store where I had a problem and that they called me and left a message to that effect. I checked my call log and there's nothing at the time and date reported. Nobody told me I had a credit, and absolutely nobody called and left a message as described. I would like to speak to someone who can directly address the issue reported, not an email exchange, not a chat, but a phone conversation. The store was so awful, even if I have a store credit there, I'm not comfortable calling them back. What's worse now is that I'm being lied to about getting a call and message about the credit. What does a person have to do to get the attention of someone who cares about the customer?