Changing the data of a tableView inserted into a viewCollectionCell?

Question

Apple Xcode

Good afternoon. Tell me please.
I need to change the data in the cells of a tableView inserted into a viewCollectionCell.
tableView has Tag=100, tableViewCell Tag=200.
There is a code that allows you to display data in only one cell of the table (see below).
In the myIndexPath variable, I can only store the range 0-1. Tell me how to change the value of myIndexPath or how to solve the problem in another way?
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *identifier = @"Cell";
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
UITableView *myTable = (UITableView *) [cell viewWithTag:100];
UITableViewCell *myCell = (UITableViewCell *) [cell viewWithTag:200];
myCell = [myTable dequeueReusableCellWithIdentifier:@"eventCell" forIndexPath:myIndexPath];
myCell.textLabel.text =[NSString stringWithFormat:@"%@", @0];
return cell;
}