money dissppear overnight out of medical savings

yesterday I had R3 910 in my medical savings account, today R0.00 how is it possible that without using it, the money is gonei. i already paid more than R15 000 in as 20 % of my oncology claims, now again one or other *********** person causes that money is deducted from the savings account and not the oncology that means we can't use the medical savings for the rest of the year and how many times during this year I had to phone in to correct claims, I think it is unacceptable and it is now weekend what if I had to take my children to the doctor sorry no funds and in the meanwhile there was suppose to be funds avaialble