Penalized for paying my account early

21 November '14 I paid my store card *** and again 09 December '14 -R800 reason being bonusses being paid out. All my other retail accounts was paid on last said day yet only Woolworths sends me a statement with a double payment for January '15. Quereying this, I am told last payment was taken as and account adjustment and not payment and that you have to pay after a certain date in order to be seen as an account payment. No where is this mentioned on their website or on previous statements. Then after another query the said two payment was altered to R644 in Dec '14 and another R677 in Jan'15 without my permission thus I see this is ***** not to mention the R512 in payment that is nowhere to found yet I am stuck with a double instalement which I will not pay. This is not my mistake - I paid my account in December and it in not mistake for not being informed regarding these silly rules. Not one of the other retailers issued me with this ****. After several e-mails and phone calls I was issued with an e-mail to inform me of the \pay after a certain date before seen as a payment story"which I will not accept. Woolworths made the mistake and should rectify it ASAP <div><br></div><div><em>(Supplier name changed from Woolworths Insurance to Woolworths South Africa by Hellopeter.com)</em></div> """