Verb conjugation of "beklagen" in German

I did not want to give them any money so they became more aggresive and began holding my hand and said 'please, please' all the time. Finally I decided to give them some money but could not find the wallet.
Anyway, once we arrived at the guest house the rules were explained: Washing my Jeans would be 2 dollars, a pair of socks 1 dollar and so on. I did not feel comfortable with these people.
We had to be careful of not falling into the water. We rowed for about an hour and we got tired pretty easily. Especially the other man and woman looked devastated, at the limit of their physical capabilities.