Filter Tech far too busy to keep customers up to date.

My son purchased R17 164.00 woth of filters, from the above mentioned company, this was on 18/05/ 2020. There were 5 filters that were not in stock but were paid for along with those that were supp****. Three weeks later after no communication what so ever from them, I phoned and left a message for Carmen the lady in charge. I still heard nothing from her and phoned again and was told she had left for the day but would be informed of my second call. Today after not having heard anything from them, I phoned again and insisted on speaking to Carmen. When I enquired why she had not bothered to return my calls I was told she was much too busy to phone me. Tried to tell her that communications is what business is all about, even if her suppliers keep her in the dark it would be nice to be reassured that I was still in the picture. We all have a lot of work to do but in these tough times it is best not to basically tell a customer to P**s off. I may only be a simple farmer but I also have customers to supply with fruit, without tractors this is not easy, but you bet that I keep them up to date on what is happening every step of the way. I worked in commerce for many years and know that keeping ones clients informed is all that you need to do, never had anyone get upset at being kept in the loop even if it was not what they wanted to hear.