Worst service ever

this is a continuation of a previous unresolved dispute which they tried calling me, however i was in a meeting and couldn't answer the call, they then sent an email to ask when to call which i responded to asking them to call me the next day at 11am. to date i have not received a call, furthermore my dispute is not sorted out. i tried calling today and spoke to a Karen, i asked to speak to the manager no manager available. she then said my dispute is with the sales department and put me on hold and transferred me to another agent named portia bruintjies who firstly i asked to speak to manager which i got the same response no manager is available. *** is there only freaking agents running your business. are your agents stupid. i asked for a reference for the call and she couldn't give me one because she says we still on the call. she then put me on hold without asking me and 10 mins later comes back and says she is putting me through the sales department so sort out my dispute. i told do not put me through to them and yes i am extremely frustrated and she then dropped the call. please sort this out by tomorrow or i will close this account which i have from 2007. call me by 8am