In Jan 2018 I renewed my broadband contract for another 18 months in order to avoid the price increase. I've now received another notification of a price increase. I'm sure when I renewed in Jan that my price would be fixed for the 18 months (which I why I decided to stay) but I can't find copies of the letters from Dec-Jan time to check this.
Does anyone know where I can request or view copies of all letters BT have sent me? I've tried BT chat but they've not been very helpful.