They actually said "this is not allowed". Sounds very much like a CS agent reiterating that the URL is on a ban list. You reading it like the CS agent is saying

They actually said "this is not allowed". Sounds very much like a CS agent reiterating that the URL is on a ban list. You reading it like the CS agent is saying using a competitor is just your interpretation. Look at it like this, specifically banning something because it's a competitor would be a huge deal (rightly so). With that in mind, do you really suppose they would tell the agent that directly?