Poor customer service

I have received excellent service from Priscilla Zandamela, but that's where it stopped. I had to return the rental vehicle on December 14, 2022, but my vehicle was not yet repaired. The panel beater received the part in January, and I had to return my vehicle to get it repaired. I spoke to Colin Makhubela to arrange a rental vehicle for the period that my vehicle will be at the panel beater. She assured me that a rental would be arranged. I've been trying to get hold of her to arrange a date for the rental vehicle, but to no avail. My emails don't get answered, and I have left countless messages, but she does not contact me. I even left a complaint on their website, but still nothing from Momentum. I am worried that my claim will be rejected because of the time delay.