Woolworths increased my credit limit without my knowledge!!

Actually no STARS! WOOLWORTHS! BEWARE!!

Has this happened to anyone before? My woolies account are over the credit limit. According to their WFS reply it is because of interest.. Like almost R2000 over!! What I've noted while seeing this exorbitant amount, was that they increased my credit limit to make up for their mistake without prior agreement or my knowledge. BEWARE!!