Where should i update a "transaction" model when having a OrderService and a TransactionService

I have two services: An OrderService which has handy methods for working with orders. And i have a TransactionService which has handy methods for working with payment transactions.

I want to update an orders status when a transaction has been paid. But i am not sure where to do this. It is, i think, neither the responsibility of the two services.

I can do something like this:

$this->orderService->updateOrderStatusUsingTransaction($order, $event->transaction);

But then i am making the orderService also responsible for updating the Transaction. While i only want it to be responsible for orders.

$this->transactionService->updateOrderStatusUsingTransaction($order, $event->transaction);

But then i am making the transactionService also responsible for updating the Transaction. While i only want that to be responsible for transactions.

/**
 * Handle the event.
 *
 * @param TransactionChanged $event
 * @return void
 */
public function handle(TransactionChanged $event) {
    /** @var Order $order */
    $order = $event->transaction->order()->first();
    /** @var User $customer */
    $customer = $order->customer()->first();

    $this->orderService->updateOrderStatusUsingTransaction($order, $event->transaction);
    $this->orderMailService->mailCustomerAboutCurrentOrderStatus($order, $customer);
}

I suspect i need an additional layer outside of these services to help me solve the problem. What would be some best practises?