Frustrating wait

A technician from Defy took my hob on the 24th of March, promise to return om the 25th. Today is the 1st of April, over a week without a stove, no feedback. Worse I can't get hold of the technician

Called their call Centre, some lady said the technician has adviced he will be returning my fixed hob today. Hours later still nothing, call again. Am now told on their system it says they still waiting for the hob to be fix. This is really frustrating.