customer care & service

I have an LTE modem from Telkom. In the early hours of the 26th November we had experienced a power surge which in turn damaged chargers and so on, in the event the switched off. So I took the device to Telkom at The Glen & was told there they cannot do anything because they cannot test the unit & that i should go to Southgate Telkom where it can be tested. Eventually this weekend i went through and they 'tested' the modem (they just used another power supply & plugged it to the modem) & it worked. So i asked if they would replace the damaged power supply which in turn the answer was no, they do not cover for that damage, i asked if i could buy a new one & again no was the answer, because they don't get stock of these items. I was told to go find a universal power supply from one of the Chinese or Indian shops. This is ridiculous, how can you then sell a product that you don't have spares for? If my modem blew up then? just no modem or must i go get one from the Chinese or Indian shops? My modem is still not working & I am paying for data & a modem, If I want to use the data I have to make a plan to put the sim card somewhere so i can use the data. If that's the case give me money back for the modem.