ADSL Business gets \suspended"without reason"""

My ADSL account for my medical practice has been suspended without reason for the 4th time in 2 months with no obvious reason. Internet goes of without warning and when you phone Telkom, they acknowledge that the account is suspended but they have no reason why. Neither the Accounts department or the Technical Dept can find a reason and they re-activate the account within a few hours only to do the same thing later again. I cannot retrieve medical reports, X-rays or back-up information and seriously impacts patient care and safety. Who can help?!