Has any of you had problems with Paypal? I HAVE, three in a row

- I sent 40 euros to a radio which can only survive with her listeners' subscriptions. They sent twice that amount. I complained but that was two months ago, I still haven't heard from them.
- I sent 20 euros to another site. The money "couldn't be transferred". No explanation.
- I tried to pay for a sweater by Paypal. The transaction was refused again.
I do think that's a bit much, I don't trust them anymore.