Changes to my account without my consent

Last month I went to Legit Greenacres in Port Elizabeth to pay my account.I was helped by Melany Plaatjes who notified me that Legit wants to give me a Credit increase.I politely refused as I did not want it.<br> <br> Melany then asked me to sign to say I've declined the increase and I signed. This month I receive my statement only to notice my credit limit has been increased, instead of R1499 it is now R2000. How did this happen when I clearly told Melany I do not want an increase and I signed to decline it?<br> <br> Who is in fault, Melany or Edcon? This increase is done without my consent and I do not want it.<br> <br> Melany is very rude and cannot speak to customers politely.She has a very bad attitude for someone in Retail and does not explain Edcon products and services clearly to customers. Surely this is not the first complaint you've received about her at this store. She must be issued with a Written Warning and put on special 7 days unpaid leave for her behaviour so she can sort out her attitude problems and learn to speak as well as assist customers politely instead of being rude and impatient always.