Verb conjugation of "pester" in English

The billing of additional working hours is not justified, since it was our request to download the software and wait for the new version. They have admitted the error of the translation.
I have three children, Michelle, Cathy and Joe. Unfortunately, my parents do not live in the area. I am glad that they visit every 2 weeks, although they are already over 70 years old.
My Spanish is weak, and I need to improve it here. But it is very difficult because I have many other things to do. I must take care of my family and my friends and have no time for Spanish.