Disappointed with rude sales people

I am really sad to have to review this place negatively but something needs to be said. I bought a Golf R from the sales agent Mosa Ntsane in 2017, she was working in Rivonia at the time and seemed very helpful. Unfortunately, the car got written off in February this year in an attempted hijacking. As a temporary replacement, and because the new Golf R is only due to come out at the end of this year or beginning of 2023, I bought a Polo Gti from Mosa again, but this time it was from the Melrose branch (she had moved). I paid cash for the car. I am now finding the car a little small for my needs and I was wanting to trade in the Polo Gti (which only has 3000km of mileage and still looks like new) for a new T Cross. I would pay cash for this too. I have been trying to get hold of Mosa for 3 weeks now. She doesn't answer her phone and she doesn't return my call after leaving several messages for her. I called her this morning again, and although she answered, she was very rude to me and said she would call me back. Six hours later, she still hasn't returned my call, and is not picking up her cell phone or landline. I have attempted to get hold of Jarryd, the manager, to assist me, but he is also always unavailable, and doesn't return the endless messages I have left for him to call me back. Is this how sales people are supposed to behave with a client who has remained loyal to their brand in choosing 3 consecutive vehicles? I am really disappointed. It seems like once Mosa makes a sale, she loses all interest in the client. I was getting dozens of calls from her before purchasing the Polo and now she's being downright rude and unprofessional. As for Jarryd, I feel he needs to be more on the ball with his staff and with clients. I contacted another branch, as I am still interested in the T Cross, but I can't give another cash sale to a branch that is being so ugly and dismissive towards me. The other branch's sales person has already sent me close to 40 pictures of the T Cross, and wad able to tell me everything about the car. If I choose to stay with VW (and this disgusting behaviour is making me question if this is the brand I would like to deal with going forward), I will go to another branch, where people are helpful and professional. I am not asking for preferential treatment, I am simply expecting Mosa and Jarryd to do their jobs. Unfriendly is one thing, but complete dismissal and disregard towards a client is not acceptable. Just like I am expected to do my job properly, I expect others to as well. Mosa is brilliant at putting on a show of enthusiasm before making a sale, and then losing interest and behaving poorly afterwards, even though I still wanted to buy another vehicle from her in cash.