Poor to no service

I emailed FNB on 14/04/2018 and asked them to cancel the overdraft facility on my business account. On 20th I received an email asking me to sent email a signed letter on letterhead, which I did immediately. Today the 30th, this still hasn't been done. The reason I am cancelling overdraft is so I can close my account because I am sick of their lack of service and customer consideration. You can't go into a branch without expecting to spend 2 hours in there. There help facilities are pathetic, phones ring and ring forever anytime time of the day or any day of week with message saying "we are experiencing higher than normal call rates' over and over and over again. Browsing through pages and pages of complaints about FNB on 'Hello Peter' " one can see 99% indicate the same issues with FNB, And FNB has not responded to any of them. Obviously Customers aren't important!!! And there motto is 'How can we help you' YOU CAN'T/DON'T and will no longer need to. I'm going else where!