Problems with Mastercard abroad

Last weekend I was in Prague with my girlfriend. We stayed in the IBIS hotel Karlin. When they asked me how would I pay, I said, I would pay with my debit Mastercard. They took it to "authorize me".

To my surprise the amount of approx. 300 EUR was taken, I recieved an notification SMS immediatelly.

They said they are going to return this at the check-out date.

Ok, after a check-out they gave me two reciepts, one for the rollback of the authorization (300 EUR) and second for our room (178 EUR).  

Now, five days have passed, and I didn't get my money back ! Why ?

.. I went to my bank, they said - It's a problem of a hotel. 

So I decided to call a hotel manager. They said, as I thought, the problem is in the bank, and it's an usual situation and I should wait and wait and wait until I'll get my money back. But how long ???

Is it normal ? 300 EUR were taken immediatelly, so what the hell the return takes such a long time ?

How then the clients should be motivated to pay with a card, when such situation happens?

I am not desperate about that money, it's about a principle..

My friend said, what would happen when you will travel around europe and everytime you will stay night in different hotel you will pay also the authorization.

A friend of mine payed the same way somewhere in France. His money are somewhere "on the way" in the virtual world second week !