Bad service not expected from such a big brand

What ****py service! I have been in contact with Woolworths in August for a default listed on my credit rating. I made them aware of this and was informed in writing that the credit bureaus records will be updated. Recently I was informed again of this listing and find it pathetic that after all this running around and calling them to sort it out this has not been done. I have been in communication with almost every department and without any response from woolworths. I have provided them with proof of payments made each month which was actually taken from they website and still waiting for this matter to be resolved or someone to call me and clear this matter up.