C++ pointer array not inputing data properly - c++

Question

I am working on a school project in C++.
My issue at the moment is with the 'placePiece' function. I can't seem to get it to properly place the char value for the player into the array that represent the game board, it always seems to assign the 'p' (Player) and 'c' (Computer) values to completely random cells within the game board.
Place piece function:
bool placePiece(char** pBoard, int colSize, int rowSize, int columnSelection, char player)
{
char* pRow = pBoard[columnSelection];
for (int j = colSize; j >0; j--){
if(pRow[j] == ' '){
pRow[j] = player;
return true;
}
}
return false;
}
Print board function:
void printBoard(char** pBoard, int colSize, int rowSize){
for(int i = 0; i < rowSize; i++){ //Print the current values of each cell
char* pRow = pBoard[i];
for (int j = 0; j < colSize; j++) {
if(j==0){
std::cout << "|" << pRow[j] << "|";
}else{
std::cout << pRow[j] << "|";
}
}
std::cout << std::endl<<std::endl;
}
}
int main (To put it all together, there is obviously a lot of missing code to fully complete the project that's not included in here because it has no relevance to the issue at hand.)
int main(){
srand (time(NULL));
int32_t connectedPiecesToWin = 0;
int32_t rowSize = 0;
int32_t colSize = 0;
std::cout << "How many connected pieces does it take to win?" << std::endl;
std::cin >> connectedPiecesToWin;
rowSize = connectedPiecesToWin + 2;
colSize = connectedPiecesToWin + 3;
char** pBoard = NULL;
// initialize board
//Assign first dimension
pBoard = new char*[rowSize];
//Assign second dimension
for(int i = 0; i < rowSize; i++){
pBoard[i] = new char[colSize];
char* pRow = pBoard[i];
for(int j=0;j<colSize;j++){
pRow[j] = ' ';
}
}
char player = 'p';
do
{
int columnChoice = 0;
do
{
if (player == 'p')
{
printBoard(pBoard, colSize, rowSize);
std::cout << "Player's column: ";
std::cin >> columnChoice;
}
else
{
// computers turn
columnChoice = rand() % colSize;
}
} while (!placePiece(pBoard, colSize, rowSize, columnChoice, player));
printBoard(pBoard, colSize, rowSize);
return 0;
}