Nimble and unprofessional ethics.....

I'm very frastrated with Nimble I have sent countless emails, WhatsApp and called to get my paid-up letter. They always say ,will send it after the call but they never do. I am sick and tired it's been months .The response is very poor. We pay, but nimble is very rude and never attend to their clients. The service is very appalling. To some extent it feels like they **** people.