The fixed telephone of our company received a call one day. It seems to belong to the telecom company. It says there is a service called SMS automatic reply. I don't even know whether to cancel it now

The fixed telephone of our company received a call one day. It seems to belong to the telecom company. It says there is a service called SMS automatic reply. I don't even know whether to cancel it now. Call customer service to complain. Tracing back to the source, can't telecommunications even find out the source? Introduce the commercial fixed telephone of mobile company. Long-distance calls are six cents a minute, no monthly rent, wireless and easy to install. You can install it by phone at home, recharge your account with 200 yuan at one time, and send a phone call for free.