THISIS HOW VIRGIN MOBILE THANKS US 10 YEARS

We have business contracts with Virgin mobile for 10 years...or should i say NO service for 10 years...every month there is some kind of query which never gets resolved...or answered...not to say..... Accounts is always a problem....debit notes of 800 rand that can not be explained...if you dont pay...suspnd...even without explination.... calls on bills that we do not know....cannot be explained...but get this!!!! we upgraded an got 2 off Samsung A5 handsets...my hubby opened his..only to find there is a factory fauld..so he locks it away and use the next one. i send emails complaining about this....i was told to bring it back...fir the 4th time travel to EASTGATE, ok so we need to trave 80 km....only to hear it will not be replaced by send for repairs....2 weeke later I get a loan phone...ha ha...the SIM is not compatible....the week later got the A5 back...with the same problem...this is 3 weeks now...no communication..and 20 e mails..without response..... today i had to hear after I called in ONCE AGAIN....they are replacing it...BUT THEY DO NOT HAVE STOCK!!!! I do not know where to turn to...this is company phones and contracts....I NEED HELP