Irate with a ********** account from Avon

I'm disgusted with Avon. I have emailed them about 3 times about a ********** account opened with them. I keep getting what I assume to be an automated response saying the matter is being investigated. This is affecting my credit rating negatively as I'm having difficulty getting a bond lately. Banks are picking this up. What annoys me even more is that you can't even call to try and get this sorted speedily, the only option is to email them. They asked for 6 signature specimens, an affidavit and a copy of my Id document which I have submitted twice via email but still no help from them. I need a letter to confirm that the indeed isn't mine so I can get on with my life.