Back to over Weight After 6 Months

I inseted a balloon in last november when I was 81 kg. First three days were horrible and I was vomiting in every minute. I lost 6 kg in 4 months. Then it started increasing again with the same diet plan and activity. Keep in mind that you can eat so little with this balloon in your stomach and still my weight has steadily increased in 5th and 6th month and I am back to my earlier weight(81 kg). It was a complete waste of time and money and I got it removed after 6 months even though I could keep it for a year. It is advisable only for a quick weightloss on the occasion of wedding.