I would suggest that you obtain just one credit card to begin with, put a small balance on it and set up a direct debit to make payments. This will get your credit history back in business, so to speak. Creditors base their decisions on your credit history so if you have completed an IVA, they will notice that the IVA is complete but there will be no regular payments showing up on your file. Starting to make regular payments on a small balance will provide creditors with something they can consider.
However, it should be noted that even people with perfect credit scores or history are being rejected for credit so, in this day and age, don't take any rejections personally.
And...if you do find yourself in the same position again, you can always go for a second IVA!!