Poor Customer Service

I returned my Simplygo Mini Portable Oxygen Concentrator which was under guaranteed to Afrox homecare in Durban on the 15/09/20 when Swastika was still there and was given a loan unit. It is now the 2912/20 and my own unit has still not being returned as yet and the loaned unit has become faulty and making a loud noise resulting in me not being able to go out due to not having a portable concentrator. I have tried calling and messaging Yeshnie several times to no avail and received no answer