I am desperate for assistance please !

Hi, I submitted a request via your cancellations department to prematurely cancel my LTE contract as I have installed a ADSL, this week I phone the call centre twice and was advised there is no line to contact them however the ladies I spoke to on both occasions asked that I emailed the documentation to them and promised I will receive feedback by close of business. Neither have responded to date when I emailed them today, also not responded. I am now desperate, how do I go about this ?