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Can't comment on exiles but I use Helpers although from what I hear there is now a waiting list. They charge 35aed per hour with 3 hour time slots - not sure if you can do 4 hours or not. I think it's 9-12 or 2-5. We've been using them for around 6 months and have been pleased with their services and the fact that there is no contract. You can cancel if you are going on holiday or add more days here and there without problem. GL!