DALLAS, TEXAS -- This is the 3rd time this has happened to me. I set up an account with my number and some other numbers for friends and family to receive calls from my son. Another inmate made calls to a number on my account and funds were deducted from my account to pay for those calls (over $15.00). I called and wrote and emailed and was told that since the phone number accepted the call I was responsible. I was told I would have to "Block" that facility. I did. When my son was moved again, I then blocked the facility he was moved from, but AGAIN calls were made by another inmate and AGAIN I was charged ($27.00) and was told that now I had to block the prison from EACH on the numbers on my account, not just my account. I have been using correctional billing services for several years and NEVER was any information given to me regarding safegarding my account. When I specifically did what they told me to in blocking facilities...then when another incident happens, the rules change. It is particularly disappointing as I asked each time if my account was protected and was told absulutely; which was not the truth at all and has cost me money I cannot afford and deprives my son from talking with his family and friends. Something needs to be done as the billing service REFUSES to make any adjustment AND the representative wouldn't let me speak to her supervisor at first, then kept me waiting over 30 minutes to talk to the supervisor who said there wasn't anyone above her who could help me and wouldn't give me a name of anyone else to talk to about the problem.