Deleting a node from a Binary Tree Search

Deleting a node from a Binary Tree Search

I think there are multiple errors in my code for deleting a node from a
BST. I just can't figure out what! Here's my code. Thanks in advance!
void del(int val){
help = root;
f = help;
while (help){
if(help->data==val) break;
f = help;
if (val > help-> data) help = help->right;
else help = help->left;
} if(help->data != val) printf("\nElement not found!");
else{
printf("Element found!");
target = help;
if(val>f->data){
if(target->right && !target->left) {f->right = target->right;
f = target->right;}
else {f->right = target->left; f = target->left;}
} else{
if(target->right && !target->left) {f->left = target->right; f
= target->right;}
else {f->left = target->left; f = target->left;}
}
while(help ->right) help = help->right;
if(help->left) help = help->left;
f->right = help;
free(target);
}
}