Shocking service from Discover Card division

I have had a Discovery credit card since 2005. On a recent trip to the USA I needed more funds and app**** for an extension of my credit limit. I app**** on 12 Feb and was told I would receive and answer shortly. I heard nothing and phoned them again. And emailed again. And again. In all there were 7 email exchanges (each sith a different reference number) and several phone calls, before they eventually refused my application, on 23 Feb. By which time I was back in the country. <br> I am outraged, first because it took them 11 days to give me an answer, and secondly because I have been a good paying customer for nearly 10 years. Treatment like this is UNACCEPTABLE. Shame on you Discovery Card.