Credit card canceled without my permission

Good day I am highly upset with your service. I have sent an email to *** to cancel the protection plan on my credit card. After a month of no response I saw that the debit oder has gone off. So I responded to the email I sent before telling them the service is bad. This morning I received a response say my CREDIT CARD has been cancel. I'm am beyond ****ed off because whoever read my email cannot read, you are telling me I have to apply for a card again knowing I I will be declined. I feel this is not my fault why should they temper with my credit score if it was the individual working at fnb fault. Why can't you just reactivate my damn card. I tried to re apply and I am declined. This is not fair because I need this card.