Changing my Premium twice

I have taken a motor vehicle insurance with MiWay a while back. They have increased my premiums previously and I accepted. Earlier this year , they increased the premium. I shopped around for a lesser premium with another insurance company. I gave MiWay a notice to terminate with them and they revised my premium to closer to the new insurance premium. After they urged me to stay with them, i received a letter of notice last week that they will increase my premium, less than 2 months after they adjusted it downwards. All this increases happen whilst i have never claimed anything in the last 3 yrs. <br> Also on the new schedule, the have even increased my excess. That's a double blow. Best you cancel my insurance with you end of May 2015 and I will look for another insurance. My premiums must go down esp given that i haven't claimed in the period. I have proved to be low risk and I can't be disadvantaged here.