selfish company

In October i got a call from betterlife for life cover for my mortage bond and they were to start their debit in january,but after i meet with my bank i decided to take their life cover and cancell the one i have with betterlife but to my suprice they dont want me cancell they busy asking for cession letter which my bank said it a strategy that they using to delay the cancellation process. I have these words for them set me free guys i dont need you service please understand it business. Please help hello peter