****er alerts

Pay just now is ****ming me after I told them that I im getting paid on the last day of the month... Now they increase the money that I owe them... I did write them a email regarding the matter before however the matter wasn't resolve.... Please help me out here...the initial amount I was supposed to pay is R333 now it's says R470 on the 27 September... Still I won't have money so they will increase it even more before I get paid... I have prove that I did email them before