Siemens Home India — Siemens gas burner

Had purchased Siemens gas burner 4 years ago, from the first year we have been facing various issues such as inconsistent flame, sudden swItching off, sudden small explosion etc . This has been happening from 4 years continuously and we had complained various times but we were advised to take service which costed a hefty amount which was not worth it . Once we had paid 800 for just 10 sec of no work at all .
Now out of nowhere the igniters have stopped working which is costing more than a basic stove . I would like Siemens team to look into this issue of the gas burner, which was promised to be the best while purchasing . We can go to the consumer court regarding the same but we have almost all products from Siemens also we wouldn’t want to defame your company .
Provide me complete free service or replace the product or give us what you had promised .