HELP! need contact information to submit claim for plumbing issues due to At&t cabling

Please provide email or phone number and/or get instructions to submit plumbing bills to fix a broken pipe due to at&t cabling. I have pictures, plumber diagnostics, and statements. I left a voicemail at the indicated number one MONTH ago and never heard back. I do not want to get a (Edited per community guidelines) involved because I do not want to needlessly increase costs to at&t. I just want to get PROMPTLY reimbursed for what I have spent.