I wonder if this story might help you as I've been having similar problems to you.
I was getting really angry at not being able to connect with my spirit guide on Tuesday. I have been meditating for weeks now, trying to clear my mind and connect with my guide and it just aint happening!
On Tuesday I wanted some guidance from my guide about some big life questions. I wrote down 6 options to consider, and thought that option 2 was the best one for me logically, but then I started to doubt myself.
I got really angry and I think at one point I said out loud,
'What's the effing* point of having a spirit guide if I can't hear you?'
*I'm not sure you're supposed to swear at your guides but I had lost it!
Anyway within half an hour I had a phonecall from a stranger asking me about 'option 2' and if I could help her. Then a friend called and asked about Option 2 and we could set a date for me to talk to her about it. Then another friend called and asked if she could pop round to borrow a CD I own that is about Option 2.
Just as I was going to bed I suddenly realised that these three phonecalls in such quick succession were a message! OK I didn't hear voices in my ears, but the message came through crystal clear.
Sometimes the message come through in a way you don't expect it.