Odd text messages received after porting to T-mobile.

I just ported into Tmobile the other day and I have been getting text messages from a number I have never seen in my life. I have had my number for around 5 years and it is kind of strange to start getting messages like this the day after I port my number to a new carrier.

The texts are from the same number and they are talking to someone and its like I am reading half of someones conversation. I think its a routing issue from the port process but Tmobile seems to think that this person is actually sending me these messages either on purpose or by accident. They want me to contact them to see why they are sending me messages but I don't think thats going to get get me very far.

Has anyone ever heard of anything like this before? I have received around 6-7 messages from this person over the last day or so. Its getting kind of annoying and I don't want to be getting this persons texts anymore. Anyone have any advice on what to do?