HP India — The technician changed motherboard and saying reset call cables. Want refund or replacement

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India

I have purchased hp 11gen laptop on[protected], in the nearer store but it heats so much and automatically restart and blue screen error and freezing. They said we will see but it didn't resolved and the technician came and changed motherboard we didn't even know. We only called the store. Now its been 25 days they took. I said I don't want to take back. I want replacement but the hp and store denying it and saying call cables refixed it is working fine.
Hp is such a bad company I want only refund or replacement. Because they didn't noticed me before 14 days now they are denying the problem.