Appalling Accounts and Customer Service!!!!!!

I would like to lodge a formal complaint regarding Homechoice bad customer service, calling me about arrears account but fail to give me correct information.<br> Background:<br> Ordered a Kimi Kids Combo bunk bed from Homechoice Jan 2015 and took delivery in Jan as well (attached invoice which states first instalment due Feb 2015). Thus far I have made 2 payments of R902.80 - as per invoice/contract which confirms monthly instalment, for Feb and Mar (sent proof of payment) - therefore the next payment due and will be paid 25th April 2015. <br> Homechoice how it is possible that my account is in arrears?? Why am I getting calls mid month to say that X-amount is due immediately when we agreed that I will pay account once a month (which I have been doing) and my next payment is due end April (or in my case around 25th April). CAN SOMEONE PLEASE EXPLAIN - I will NOT tolerate the attitude from your consultants as if I have been skipping or evading payments <br> So it's day 2 and no email feedback as requested (and agreed with the two people I spoke to - Supervisor and manager).<br> Proves my point - poor customer service, bad administration. Happy to pay the missing service fee but pathetic service!