Kettle still faulty after repair

The Mellerware Milan Cordless kettle was purchased by us on 24 March. Recently we noticed that it has intermittent contact between the base and the kettle and will start to boil then contact is lost. We took it to the service centre in Croydon for repair. My wife fetched it on 11 June and when we switched it on it is exactly as before. The job card says refitted switch. Why?. The problem is between the base and the kettle. I don't blame the technician however for replacing the switch as it is the most flimsy shoddy switch I have ever seen and cannot see how it can last. A very poor product by Mellerware which I hope can be sorted out by your service department without a million trips to your service centre.