Cleaner code in Laravel for factory pattern

I have an application where I have to deal with multiple vendors - each having their different implementation. For example, let's say Payment Systems, there are many vendors and banks.

There are a few things common, like implementation process. In each case, I have to give a callback URL to them to give me a response.

For now, I have two vendors - VendorPay and VendorA.

I will have two routes:

payment/callback/vendorpay
payment/callback/vendora

each of them call two methods in controller.

processVendorpay and processVendora

Now, if I want to add, lets say, 15 more vendors like this, will I have to create methods everytime I add new vendor? Is there any cleaner solution for this?

My controller right now looks like this:

class PaymentController extends BaseController
{
    protected $vendorpay_validator, $vendora_validator, $transaction, $transaction_log, $vendor_product, $vendor_transaction;

    public function __construct(VendorpayValidator $vendorpay_validator, VendorAValidator $vendora_validator, Transaction $transaction, TransactionLog $transaction_log, VendorProduct $vendor_product, VendorTransaction $vendor_transaction)
    {
        $this->vendorpay_validator = $vendorpay_validator;
        $this->vendora_validator = $vendora_validator;
        $this->transaction = $transaction;
        $this->transaction_log = $transaction_log;
        $this->vendor_product = $vendor_product;
        $this->vendor_transaction = $vendor_transaction;
    }
}

These four are the Model Repository Objects: $transaction, $transaction_log, $vendor_product, $vendor_transaction

If I have to add more venodrs, it keeps on adding validator object here. What would be a much cleaner way to do it?

One of the solutions that I thought was - for multiple routes, I just create one method. Now I'll check the route in this method and call the Factory Object basis on that.