Afrihost not willing to help after DDoS attach

We hosting a self managed server with Afrihost and since the attack we've been having issues with email. They are not ready to help, all they say is \We are sorry to say that we cannot assist you in this case. The sever is self-managed and pretty much the only thing that we can assist with is issues related to something outside of your control such as problems with the physical hardware or with network connectivity. Any issues like the one you reported should be checked with your server administrator. So kindly contact your server administrator to check this issue."<br> <br> No one border to look the root of the problem even thought things we working right before the attack. Our other shared hosting services are losing mails too. Not one ****en cars to assists"