[Resolved]  Samsung — sparking issue at port site in samsung galaxy a31

Address:

Room no 508 Jrd hostel Gtb hospital dilshad garden Delhi 110095

I have purchased samsung galaxy a31 on 31 august 2020, on day 13, 12 september 2020, while charging it start sparking at the port site, i removed the plug for charging point and leave it, for this issue, i talked to samsung chat on same day, they said visit to nearest samsung service center, i visited on 14 september 2020, and tell my problem with that phone they said its is a physical damage we can't cover it under warranty, as i requested they said we will talk to higher authority, after one day, today i receive a call from service center, they said sir u have to pay for this,
Now my concern is that, what is my fault, it's sparked while charging. It could be a blast of my phone or something like that, what should i do, i used to think that samsung has good customer support system, but they, disappoint me 2nd time, i lost several hours to get the issue resolved, but can't get a solution.
I requested u to either replace this phone or refund it as early as possible. Thanku