International calls during peak hours

Is anyone else facing issues with international calls over the past few weeks?
I'm on the international calling plan ($75 per year for 1200 minutes per month to certain countries) and only call India. Over the past few weeks I have been facing increasing difficulty (fast busy tone) in making international calls during peak hours. I understand its peak time and try a few times before giving up, but the situation has gone from irritating to frustrating and is borderline unusable right now. I've tried international calls at the same time from other services and was connected in one try. Seems to me VOIPo's international/India carrier partner is not able to handle the volume during peak hours.
Some feedback from other international plan users would be helpful.