refuses for me to speak to a supervisor

I was placed on two time for about one hour at a time then they cut the call. deduction for sms's that did not go through is my querys. the problem is with the network however cellc agents try and blame the service that offers the mobile purchase. I've been refunded on a previous query a few months ago. I've also lost a lot of airtime on numerous querys witin the year. cellc needs to sort this out and I also require all recordings of my calls to the call center as I am going to take this up further.should I require a lawyers letters for this? <br> on previous queries they also placed me on hold for hours at a time and cut me off it seems to be a solution of there's to avoid the query. can I please get details for the broadcasting association that cellc belongs to