Poor customer service

I was trying to buy electricity using the the USSD we usually used when I got a message that I am not allowed to purchase as my balance is too low,I then emailed iSmart for further assistance and was redirected to a WhatsApp number which I texted stating my problem and even gave my Meyer number/reference.I got a reply with banking details to do an eft purchase which I was later advised they do not have access to our building and to contact iSmart I then advised the agent that I already made a payment to one of their accounts which they acknowledged they were wrong in providing banking details without confirming building name,I was told to reverse the eft which I cannot and asked them to process a refund however I'm now getting emails that I have contacted the wrong company even when I try to explain my reason for contacting them,I still haven't received my money back and not getting anymore response from Remote Metering Solutions. I am still waiting for a refund and I honestly feel they need to confirm before just sending banking details we trust you as our service providers but this is really disappointing.