No see, I don't feel that 'Oh sorry we had problems with our system you got notification by email that went straight to spam due to our server IP being blocked by most email clients' is good enough.
You as a sales rep, CEO, whatever, should be on the ball on whatever threads you maintain. Also, it isn't right nor fair for you to just come back and think everything is hunky-dory just because you informed us of some ticket system problems.
As I've said the ticket system is NOT the backbone of your company, it isn't the lifeline. You have logs, and paypal invoices and all of that tracking customers and their purchases with you.
Just to relate personally, I've had a VPS upgrade in 'queue' for almost 72 hours now. My VPS has been unuseable for 72 hours due to your 'ticket system malfunction' or whatever. You've had logs since I paid for it. You could have easily dispatched an email and said 'hey we've manually upgraded your VPS, here ya go' But instead you've made me wait and lose out on using what I've paid for.
So yes I think it's charge back time on my VPS. You can't offer me enough months free to stay with you. So either approve the refund via paypal, or refund my money to me through a ticket. I will be opening one last ticket with you to get my hard earned cash from you.
Hopefully you keep your other customers happy, but you just lost one with this blatant disregard for your customer base.