Increase Alexa Rank

I need to get my Alexa rank below 50,000 in Global rank within the shortest possible time frame. I don't want any spammers or techniques which could ban my website. Currently my website is on 1,052,864 Global Rank. and 1,888 in my country. In private message please specify how much time you need to achieve the goal and what would be the price a month to keep this result. Also I need some references of similar task done by you. Payment will be made when the goal is achieved and then I will think about longer cooperation. I will not pay you for half a job, I will only pay if my requirements are met. No advance, no milestone payment. Kindly bid only if you can provide the plan to improve the Alexa rank.