unknown purchase

On 30 April 2015 Homechoice debited money from my account whereas I did not purchase anything from Homechoice. the last purchase I made at Homechoice was on the year 2013 and after that I didn't order anything till today. I called homechoice to enquire about this and they said they cannot assist me because when they were confirming my details it didn't match what they have on the system. I told the consultant that I will not hang up until I get assistance. I was transferred to someone who said since my cellnumber, residential address and occupation doesn't match what they have on the system. I must send my ID copy, proof of residence and payslip. I can't just randomly send my confidential documents esp. payslip to Homechoice because every time I call there I speak to a different person and I only have the call centre number. I can not send it to the email and fax number that I was given because it can lend in the wrong hands and already my account information was changed without even notifying me. I need one person that I can be able to consult with regarding this matter I would like a quick response so that this can be resolved as soon as possible.