are you sure he owns the server ??
looks like a reseller of a reseller to me.
as no host takes 3 days for any php extension installation.
36 hours is only a day and a half- although longer than it should take it's not impossible if it's a part timer who has other projects in the works too.
Still embarrassing for a host to have someone post on a forum that their support tickets are taking too long to answer. I hope everything is alright over there and that if their responses aren't getting through for whatever reason they notice quickly. Going too long without a reply makes people assume the worst.
I think the issue is you submitted a email when you should have submitted a ticket or called him. While it's true the host should have answered the email sooner, depending on how many of his clients actually use email as the support method it's entirely possible he only checks it once every two to five days.
really 5$ for 5GB space ??