i took a loan from mashreq last year and it was the most wrong decision i ever took. the reason i choosed this bank was the interest and speed of service and both are wrong.
it took them 2 months to finalize the transaction and that was after i emailed their VP in Dubai about it. believe it or not Qatar presence of the bank is just dummy,sweet talk only, but someone in UAE must take the decision.

i faced a situation that i needed to postponed an installment
answer: we stopped this service 2 years ago.

i have made a transaction in the first week of the statement for big amount and applied to be installed on 9 months with its high interest
answer: after 3 calls to customer service (which is by the way in UAE) they confirm to me that someone will call me right after i hang off the call to finalize the transaction, and nothing happens. in the forth call, they apologies as at the time of the forth call the statement is closed and the transaction must be done in the same month.

i have went to another bank to transfer all my accounts to, i need liability letter to finalize the transaction
answer: we want you to stay with us, check what offer you get and we ill match it for you. "no, thanks i need te documents only"
2 weeks and documents are not yet given to me, why? we are still waiting for approval ?!?!?!?!!

i'm going there this week again to check, if i did not get it , i will resume on the same email of last year to their VP

tip of advice to deal with such bank, bring it up in the bank itself (UAE not dummy qatar office)
if this did not work with you, report to CB. banks do not like complaints, it is like black dots in renewals