Electrolux India — Items in the refrigerator is not cooling

We purchased electrolux microwave oven c23J101 - BBCG ON 17TH MAY 2015 from flipkart through the account of my daughter Aprajita Agnihotri. A few days back this stopped working so we contacted the helpline[protected].
A service person named Arvind (mobile [protected]) visited us on 28.03.2021 in response to our service request and told us that the there is a short circuit in magnetron and this needs to be replaced. He brought the replacement part installed it and charged us Rs. 2800 giving us a receipt of Sai service centre mentioning a one year warranty. Next day when we realized that the oven is not heating the food but only mildly warming the water, we called this person Arvind again and informed him. He assured us that this is a minor probled and will be fixed.. Another service person Sanjay (mobile[protected] visited us and after trying some repair told us that Arvind will visit us to fix the issue. We have been desperately calling all these numbers including the numbers mentioned on the receipt of Sai service centre recept but all the cantact numbers are switched off.
When we contacted the helpline[protected] again we were told that the complaint will be attended and the problem will be rectified within one day. This did not happen and now when we call this same helpline we are told that there is no complaint from us tagged to [protected]. I suspect that your team attending the helpline[protected] may be complicit in this scam. We were given a receipt in the name of Sai service centre and the phone numbers mentioned on the receipt are also switched off.
Please take care of this issue to save the good name of your prestigious organization Electrolux and help alleviate our suffering.

Please help to resolve the problem at the earliest as the life these days is highly dependent on the microwave. Kindly expedite.. an early resolution will be highly appreciated.
reply to agnihotri.[protected]@gmail.com