Week two with no Answer

FNB decided to decrease my credit limit on the 18th JUNE, FNB did this without any warning what so ever. One minute there was money available ,and the next minute it was gone. After I complained the first time, a lady called me and even agreed that it is strange that they decreased my limit without any warning, then she said she would contact the credit department and see what she can do, after which she contacted me and said they can not reverse it because it is a systematic procedure (meaning the computer did it) and they cannot override it...TRANSLATION: Sorry Sir I cannot help, the fate of your financial situation is determined by a machine!!! which we as humans cannot argue with...WOW SO PERSONAL FNB..really like that one!!, later, another lady called me only to keep avoiding my question WHICH IS HOW CAN YOU REDUCE SOMEONES AVAILABLE CREDIT WITHOUT EVEN WARNING THEM !!!! I kept on asking the lady to please confirm that my credit limit was reduced without warning, or please tell me when FNB warned me about the decrease...she kept on avoiding the question because she had no answer....I'm still waiting??...Q: PRIOR TO THE 18th JUNE WHEN WAS I WARNED ABOUT THE CREDIT DEDUCTION ??