Assisting with an account should NOT be difficult!

I have called in to query my account and why instalments are the rate they are NO ONE can give me a decent response or assistance with this. They cannot even tell me when the instalment plan ENDS. It is revolving - perhaps that means I can pay over the next 20 years. I held for a good 15 minutes whilst the accounts person tried to find someone who could assist me - no-one was obviously interested in helping her out. Phoned Dion Wired from whom I purchased the goods - they pass the buck back to RCS. This is absolutely ridiculous. I now have to resort to logging a Hello Peter complaint to hopefully get resolution. Absolutely unacceptable!