According to Ofcom Three is now rivals O2 as the least complained about operator 
What will Wavejock do now

http://www.mobiletoday.co.uk/news/in..._operator.aspx
Orange generated above average complaints at 0.12 per 1,000 customers, largely driven by issues related to billing and complaints handling.
Orange was closely followed by T-Mobile which also generated complaints in excess of the industry average, at 0.11 per 1,000 customers. Complaints about Virgin Mobile were also above the industry average at 0.07 per 1,000 customers.
Ofcom received fewest complaints about O2 and Three. Complaints against Three are now at their lowest level since Ofcom began publishing complaints data (0.033 per 1,000 customers). O2 retained its position as the provider generating fewest complaints (0.029 per thousand customers).
http://media.ofcom.org.uk/2014/03/26...ct-dec-2013-nr

What will Wavejock do now

http://www.mobiletoday.co.uk/news/in..._operator.aspx
Orange generated above average complaints at 0.12 per 1,000 customers, largely driven by issues related to billing and complaints handling.
Orange was closely followed by T-Mobile which also generated complaints in excess of the industry average, at 0.11 per 1,000 customers. Complaints about Virgin Mobile were also above the industry average at 0.07 per 1,000 customers.
Ofcom received fewest complaints about O2 and Three. Complaints against Three are now at their lowest level since Ofcom began publishing complaints data (0.033 per 1,000 customers). O2 retained its position as the provider generating fewest complaints (0.029 per thousand customers).
http://media.ofcom.org.uk/2014/03/26...ct-dec-2013-nr