Radia insisted we owed $29.72 in December 2018. I...

Radia insisted we owed $29.72 in December 2018. I contacted the secondary insurance who confirmed they had made payment. Radia insisted I go back to insurance company for information on how payment was made since they had no record and said they're calls went unanswered. I gave them the information and was informed that Radia was going to do their own investigation (December 2019). I assumed it was taken care of when I didn't hear from them for four months. In mid May I got a letter saying if I didn't pay, bill was going to collection! I'm still struggling with this with them. STAY AWAY from this company. I found their telephone customer service frustrating, robotic, and oriented toward informing the customer of their policies rather than solving problems.