Call Centre inexperienced they cannot help you with technical issues

Since January almost on a daily basis l phone Pilot software call centre to try and get them to help me with the PPIM programme that they installed on my computer,however,am transferred from one section of the department to the other and am really annoyed with the level of service,clients are not taken seriously.first weeks of January l was told to wait for staff that's on leave,now its February when l phone even the supervisors they tell me to call the call centre,call centre tries to help but they fail (always) and they tell me that they will get their supervisor to call me but l never never get that call