It happened to me exactly the same. I was in the Pro Rank and they didn't give me that title at the end of last season. I sent an email to technical support and they replied something like "they were checking what I told them." But that was 11 days ago and they haven't given me the title yet. This season I'm also in the Pro Rank and they should give me the Pack Leader title at the end. Nor will they give it to me, I will start to consider playing very little in the future.