This 3rd party mobile provider contacted me (Unsolicited) around Feb 2017 telling me that my small business contract with o2 was coming to an end.
As an O2 "Partner" they had all my information and could provide me with a great deal.
I stupidly signed a 3year contract with a "Deal Incentive"
whereby they would pay a sum to me to reduce my line rental to £25 a month,
I got 1 payment in April then nothing until in Jan 2018
I sent them a letter of contract cancellation due to "Material Breach of Contract".
My bill rose from £35 to £92 for 3gb of data and no phone !!