Dropp,
I was with HSBC Premier. I was told that following cancellation of my MasterCard, I would be required to keep the equivalent of my card's credit limit in my Current account for, if I remember correctly, 6 weeks, "in case of any late transactions turning up". So prior to card cancellation, I then had a battle with the bank when I tried to reduce my credit limit to Dhs5000, which I eventually won, so I was only required to keep at least Dhs5000in my current account following cancellation of my card. Might be a good idea if you check with your bank to see if they have the same requirement.
And yes, I'm afraid you will lose your etisalat email account.
7B