Harrassment by call centre agents

I went through the trouble of going into the shop and making payment arrangement for a period of three months as I am now undergoing temporary financial constraints, this was after many months of servicing the account well and even paying excess amount into the account.<br> <br> I get calls on my lunch time during office hours( while I explained that I work on an open office setting and do not appreciate calls of this nature) on my cellphone even after explaining my efforts and commitment to pay a thousand times...putting a cherry on top is that when I express my frustration the call centre agent hangs up the call on me! I feel utterly disgusted and downright disrespected by the way they treat their customer.<br> <br> I call head office to lay a complaint and my calls are forwarded to an answearing machine that only tells me balance on my account, amount due and thanks me. I called about four times and had to wait for a consultant to hold my call for an average of 10 minutes on each attempt! this is absolute nuisance!<br> <br> When I finally get hold on a person on the other line I learn that my initial arrangement was never processed though I was put through the person at head office! and the calls<br>