Vodacom apparently blocking OTP from Paypal

For the last 3 months I cannot get my OTP’s messages from Paypal. When I speak to the Paypal call centre they confirm that the OTP has been sent out and that it must be blocked by my service provider. When I speak to Vodacom Vodacom confirms that it is not them. So I’m not sure if it is Vodacom or PayPal. The consultant at Vodacom said that they get many of these queries. Can somebody at Vodacom with a authority help to solve the issue between Paypal and Vodacom