Good news: They've escalated my complaint and it reached the "Etisalat Prestige Care" team (lol). It sounds promising though.. here's the email:

"In reference to your email below, we apologize for the delay in reply and inconvenience caused. Please be advised that we have escalated the case with complaint number 15xxxxxx. This will be rectified within 24 hours and you shall be updated. Rest assured that the matter is given high priority and it will be resolved as soon as possible. We appreciate your patience and understanding regarding the matter."

I can see the light at the end of the tunnel.