Just to put more fuel on the fire

Why is that 9 out of 10 times when I check in on a spanish frq I am met with "station calling say again" or I have to call 2 or 3 times to get response?
It just makes me feel that the attention on the A/C's is not what I could hope for.
Btw I must also say that ATC at MAN sounds like he is sitting in a bunker and talking into a tin can. Plz fix.