Verizon sucks

I have a friend who shut off her house phone back in May. Ever since, verizon has alternately sent her refunds and late notices.  She got a late notice in July for $121.34.  She called about it.  Seems those refunds were sent in error and yes she was late.  So she sent an electronic payment in the amount of $121.34.  It cleared her account on July 17.  Yesterday, Aug 6, she got a late notice and threat to shut off her phone.  So I called for her.  I got a rep after holding forever.  He pulled up the account.  Oh, it looks like there was a payment made on Aug 2.  Ok, where has that money been for 16 days and why was she sent a late notice and a threat?  He didn't know, but it won't happen again.  Oh, yeah, of course it will.  My reply, ok you threaten to cut off her phone again when she has already paid the bill, then AT&T or Sprint is looking pretty good.  Hell, even Straight Talk is looking better than Verizon.  Oh, I assure you this won't happen again.  We'll see.