Good afternoon, I need some…

Good afternoon, I need some help please as the Theme I am using is not functioning as I require, I have been in touch with the Theme developer Pebas but getting no communication.
please take a look at my website https:” you will see that on the homepage the dropdown list does not work as only a few options available, I had a new Tradesperson register as a Roofer but it’s not in the dropdown so no customer can find him.
Do I need another Theme or plugin?
Regards David