******* charges by Afrox with absolutely no reply to correspondence

Our Company, National Coals and Carbons has had an account with Afrox for over 10 years for the supply of Suremix. In March this year they arbitrary charged our account for and additional Suremix cylinder. we emailed Afrox in March advising them that we only have one cylinder and please could they credit our account for this additional cylinder and also requested they provide us with proof that we had ordered or received an additional cylinder. having sent a further3 emails requesting feedback and credit for this ********** charge and trying to contact them via telephone we have received no reply. The last email gave Afrox 7 days to revert where after we will proceed with legal action. To date our company has received no reply- shocking and disgusting business practice from Afrox.