I am writing this to express my disappointment with the way you handled my request to upgrade my flight, It was really funny to take my miles without upgrading my flight & force me to accept economy class without any help from your side to solve this case or at least upgrade my flight while you're fixing the issue from your side. This is completely unacceptable, I cannot trust your system anymore, you have a very poor App & we cannot feel safe while we are booking using our Credit cards.