I have 2 LG G3's on my account, every month, I keep getting 1 or up to 3 "adverse action letters" stating that a device upgrade eligibility check was performed on my account. I am the only account manager authorized and the line this letter refers to is a child account. I have a credit block on my account. Why am I getting these letters? What action or request is causing them? And how can I prevent these "checks" from being performed?