Appeal against false plagiarism accusation in codechef Starter 202

I recently received a plagiarism notice. My solution matched with the other 2 people’s code, but it was purely coincidental, and I don’t even know these 2 people. When I mailed the CodeChef, they began to argue that the code matched exactly, but the code was completely natural and short

#include <bits/stdc++.h>
using namespace std;

void solve()
{
    int n;
    cin>>n;
    vector<int> a(n);
    for(int i = 0; i < n; i++)
    {
        cin>>a[i];
    }
    for(int i = 0; i < n - 1; i++)
    {
        if(a[i] > a[i+1])
        {
            cout<<i+1<<" "<<i+2<<endl;
            return;
        }
    }
    cout<<-1<<endl;
}

int main() {
	// your code goes here
	int t;
	cin>>t;
	while(t--)
	{
	    solve();
	}
	return 0;
}

This is such trivial code that it matches multiple submissions. However, the CodeChef Team is not willing to listen to these reasons and instead argues. Kindly look into this and please rectify the accusations.

It disheartens and discourages me that by this false accusation, all my hard work will be wasted. Kindly look into this issue.