Le site xsusenet.com est-il sûr ?

Very very bad support. Here is my story. I bought an paysafecard (50€) and tried to add it to my credit balance. But after completing the payment I got redirected to xsusenet.com again and showed me that the payment was unsuccessful. First of all I contacted the paysafecard team and they told me that the transfer was successful. They also contacted xsusenet.com but didn't get any response. Contacting the xsusenet.com support on my own didn't help either. Several times they told me that they will fix the issue, add the credit to my account and even promised me to compensate me for the bad circumstances. More than 45 days have passed and till now nothing happened. Never again.