DCalling is an independent and low price phone service for landline phones, cell phones, general VoIP solutions and more.
DCalling cannot refund the balance for technical reasons.
There is no expiration date for your DCalling account or balance.
There is no cancelation period. The account can be canceled anytime.
No, DCalling does not have a minimum contract duration.
No, DCalling is not at all related to your previous contract. It is an additional service that enhances your current contract and enables you to make cheaper international phone calls.