Well... looks like I need to find new VoIP provider. :(
I signed for VoipDiscount and added 10 EUR using my Paypal account. Unfortunately, when I added funds for second time, their system said something about Paypal fraud and my account was disabled. Not only that, they also disabled ALL my accounts with Betamax (that's Voipcheap.com, Voipcheap.co.uk and Voipdiscount)...
Needless to say, their customer service is non-existant. I complained to them several times, but nothing was done so far.
Anyone knows how can I initiate chargeback on Paypal?