I dont change supplier very often but after a year with NPower I was persuaded by uSwitch to change to a fixed tariff with EDF. No leaving penalty so I can change again if I like. Barely a month into my new contract I am receiving emails from comparison sites telling me how I can save money by switching again. Is it normal for customers to switch every month?
If you looked on a few sites they'll have your details and may continue to send regular emails trying to get you to use them (as they get commission on switches).
You could try getting another quote