Very few of the CoP missions that involve fighting can be solo'd at level 65. A couple can be solo'd at 75, but that's about it.
As for people not helping you - this is what linkshells and friends are for. If you haven't developed at least a loose network of friends and acquaintances by level 65, then I don't know what to tell you except maybe you should socialize a bit more...
Icemage