Eureka Forbes — denial of service request in amc for water purifier

I have an amc with eureka forbes for my ro water purifier. I have called them at least 10 times in a time span of 2 weeks for the servicing of my water purifier. Every time they say that an engineer will contact me within 48 hrs. When the engineer doesn't contact me i call them again. This time they tell me that they have escalated my issue and it will be taken on priority. But it seems they don't understand the meaning of "priority" because i have been stuck in this loop for 2 weeks and my amc is also about to end in 20 days.