My coworker and I are both web developers who graduated from a 12-month internship program in December 2017. The contract which we signed at the end of the program stated that we were to undergo another six months of probation. Before the new contract was signed, a meeting was arranged with the line manager where our roles were outlined, and a verbal statement of our salaries being raised at the end of the probation period depending on our performance. This was also supplemented by the provision of paid online courses which we were to complete to improve our credibility. However, when the time came for the supposed probation period to end, there was no word on any performance review, and we had sent a reminder to the line manager that our evaluation period was coming to the end of the six months. We were also never provided with the course material during this time, despite multiple reminders given to the line manager's personal assistant.
Two days after the reminder was sent, we received an invitation from the line manager for another meeting. In the meeting we were only given a verbal notification about the changing of our job titles. Two weeks after this meeting, we received an email from the line manager's PA, asking us how the meeting went. We responded by stating what happened. The PA then replied saying that we must keep on prompting HR for a progress update in the aftermath of the meeting, or else the promises made in the meeting would never bear fruit.
We then sent a reminder to HR about the meeting, and within a day, they responded stating that they 'will be working on it'. It has now been over three weeks since this email was sent. What do we do about reminding them without seeming too overly needy?