Bad customer service

<p>Since last year April (2016) I have requested on behalf of my grandmother to discontinue her landline as she can't afford the rates anymore she's a pensioner and doesn't has a need for her landline anymore, I emailed two cancellation form and phoned their call centre 7 times they keep on saying they will cancel the landline, but their managers are too busy to do it!!!!!!!!!! </p> <p>I want something to be done otherwise I will tell my grandmother to stop paying for a phone she doesn't use!!!!!!! </p>