AccessLine vs Rebtel

I used Rebtel for a few years and was satisfied with their service However, this year everything changed and no amount of email correspondences gave me any correctable satisfaction. I deposited $10.00 each for 2 lines. (Total :$20.00). I used those two lines to call the Philippines but only for less than 3 minutes and most times the numbers were busy. Later on I found that the first line's credits were used up. I was told that system problems caused Rebtel to charge for unconnected calls and that they would put back the credits. Never happened. Not only that, my total calls probably amounted to only 2-3 minutes. Each $10.00 was supposed to be worth 60 minutes. The second line still has $3.10 left. I checked and discovered that this second line was last used in 2017 and that was my remaining balance since 2017. So what happened to the $10.00 that I recently deposited? I wanted a live conversation with the company but was told that they would only correspond by email. Emailing was frustrating because their answer were always inadequate and did not answer the questions that I asked. Never again will I deal with this company.