Epic Accoindt Cancelation

Hello, before leaving the island and after two beautiful years I cancelled my Epic Account. I went to one of their stores before leaving and signed a termination form after paying my last bill there, the thing is I'm receiving the next month bill as it nothing happened and the support is not picking up my calls. In their website says that the only possibility is to go to one of their stores but since I already left the country is not an option. Any ideas?