Though it wouldn't be surprising that small accounts are simply not worth offering phone support service in a low margin industry.
I think the number is around $100 to $150/hour in terms of fully loaded costs for even the most junior dev. So a half hour on the phone would cost $50 to $75.
The cost to get someone on the line with actual authority to reverse anti-fraud systems would likely be an order of magnitude more expensive.
Though it would be surprising if their email ticketing system didn't have a way to track cases. I wonder how true that really is.