Stevens and Company - Ryobi Complaint.

I use a Ryobi AP13. The beginning of the year I ordered a part for this machine. Eventually, after a serious fight with them, I did receive the Part. I installed it just before lock down. It lasted for about a month. I ordered another one, using S.G.Tappin in Welkom. The order was placed with their rep., a certain Nelius. After three months we have no reply from them, no spare part. A week ago I wrote a mail to them, complaining about their non-response. Nothing happened. On Monday I phoned their office. Eric Bezuidenhout was busy and he would phone me. It did not happen. On Tuesday I phoned again. I spoke to him. He promised to phone me back. Again it did not happen. Yesterday I wrote another mail, again complaining and asking for some response, Again nothing happened. Please, is it possible for you to help me?