Terrible customer service

I app**** for a credit limit on my account on the 8 May 2018 in order to get the Apply watch. It is now 18 May 2018 and I still do not have any feedback from discovery WRT my application. their acknowledgment of documents email says I should expect feedback in 3 days. I called the call center after 3 days (11/05/18) and I was told it's 3-5days. I called again in 5 days (15/05/18)was told I would get a response by close of business, nothing came that day. I called again 17/05/18 was told again I would get a response by close of business, guess what still nothing. Called again 18/05/18 asked to speak to a team leader or manage, was told they are "all in meetings" they will call me back. This is seriously bad service from a company that wants to offer banking services. they do not even have a complaints line/department to call or email.