Atrocious customer service

I have a problem with the advanced repair centre, I escalated my problem to *** on the 22nd April. I have ben trying to follow up every now and then, my e-mails are being read BUT 11 days later no one has responded to my e-mails. the 2 people dealing with my query are Granny and Devan, they making a fool out of me by reading my mails and not responding. I called their 1944 number on the 28th, the consultant escalated my complain and promised to personally call and give feedback on the 29th...I am still waiting. I have been in contact with their twitter/social media dpt...all they do is call me to get more info BUT I don't get any feedback on my query. my NEW phone was with their SO CALLED advanced repair centre from the 30th March - 8 April and now with them since the 19th April. WHAT am I paying for??? I want all my 3 contracts with them cancelled!!!!