How does the office staff handle your call. Try calling as someone outside the district and see how they are treated. I called a local rep. who I am not able to vote for and was treated SO rudely by his staffer that I will be sending money to his opponent. I was told “Say what you want, but I won’t be passing it to him”. Other rep. from my state, yet out of my district, had very kind and professional staffers.
Also, does the politician accept email from people outside their district? To me, an elected official making decisions that effect the nation as a whole, should be accessible. Some email contact forms only allow comments if you have the “magic” 9 number zip code.