I need professional Degital Designer

Design details: We run an online store for one of the major global brands. We consistently need digital banners to be made for our digital campaigns. Usually we have a 3 to 4 campaigns a month that require design in different size that is Facebook, our website, banners for different other sites. Currently we are using a professional for the last 6-7 months and because of his availability issues we are seeking other designers. We currently pay $15 per campaign which has the same design but different sizes. Let me know if you are interested in working on a long term basis. We are based of Malaysia and would like the freelancer to work according to our timings. What we have seen in the past that the freelancers come at the time when we are closing our shop which becomes extremely difficult to manage. You can visit our ecommerce portal that is www.blip.my
Ideas for the visual style: www.blip.my
Extra notes: We run an online store for one of the major global brands. We consistently need digital banners to be made for our digital campaigns. Usually we have a 3 to 4 campaigns a month that require design in different size that is Facebook, our website, banners for different other sites. Currently we are using a professional for the last 6-7 months and because of his availability issues we are seeking other designers. We currently pay $15 per campaign which has the same design but different sizes. Let me know if you are interested in working on a long term basis. We are based of Malaysia and would like the freelancer to work according to our timings. What we have seen in the past that the freelancers come at the time when we are closing our shop which becomes extremely difficult to manage. You can visit our ecommerce portal that is www.blip.my