Upset,irritated and highly unacceptably service

On the 8th of this month I received a n online voucher from homechoice for R100 which I claimed by placing an order then thereafter I called them so I could change my address because I had moved from the one they have on the system,I was requested to send proof of address which I did (billing statement for water and lights) and the response I got was for me to send them my proof of income which I didn't because I donot have an account with them where I can get things on credit,I so then called them again then was told to resend the document together with my identification and should explain the reason why I want them to change the address,which I did!!!After that I never got any response regarding the address issue so I waited for an sms to tell me when I should expect my order which I never got(sms)so today I sent them a call me back and they did call,I asked them when am I getthing my order and the lady asked for my info then she says she can see the order on the system but I have to pay R100 and I asked her why is that because they sent me an online voucher which I did claim and paid the excess from my credit card and she tells me that on their system its not showing any voucher and that I should redo the order of which I did not agree because I have an email from homechoice confirming that order and the order number so as to why its not appearing on the system I do not know !!Again im asked to send them.emails ,so really if I did not request a call who was gonna tell me about all this and its been several times calling them and nothing has been done and now im treated as if I asked for that voucher and im now dealing with the consequences,Im really not happy with you peoples service at all and when I ask to speak to someone superior an not allowed,im really tired with this going back and forth and remember in the process im using money to be emailing you coz u dont buy data for for me!in future stop sending people your vouchers only to be treated as if you want a free order or like you some *********!!get you things right please