Pathetic - no service after 5 months of queries

i have been trying to resolve an incorrect billing issue with sparks for the last 5 months i have never in my life experienced such *********** SERVICE and don't care from a company, i emailed a Mrs Higashni Naidoo and received no response i have emailed petunia and no response, your accounts department only respond saying they have lots of queries how can you have so many queries that after 5 months of sending emails u simply don't reply, not one of your few helpdesk advisors can help ur accounts department phone only rings continuously i was told over 8 times u guys would get back to me how difficult can it be? this is unacceptable if taking a school to hello peter is what it requires to get feedback then so be it, i cannot believe how frustrating and time consuming it can be dealing with sparks accounts!