Michelin India — car tyres

. Hello i have purchased honda wrv last year from dehradun divine honda.. I have got michelin tyres in it but after only few days one of the tyre started inflatting and i can see a clear bump in the tyre... After the long discussion and arguement with the company itself, they agreed to change the tyre but after charging 25%cost of the tyre.
Now as i can see 2 more tyres are having a bump..
Your company got a very good raport in the market and i want to make it clear, what is all covered in the warranty as smaller indian companies like apollo, ceat, mrf etc. Are easily giving 2-3 replacement warranty on their tyres so please clarify what all michelin covers under their warranty clause.
Please specify and revert asap as i am sick and tired of your poor product performances and pathetic customer service and i am very soon taking this matter to the customer forum..
P. S. Either your company is making low quality products or your vendor is selling duplicate or used product to the innocent customers.