I was ****** a laptop ram at vodacom

I was ****** a laptop ram at vodacom shop standerton. I firstly went to ask for help with my laptop which could not load to home screen. They gave me a number to call, of which that didn't help at all. I went back to the store and ask the technician if he can be able to troubleshoot it. He agreed, and he took the laptop, the charger, and my number. And said he will call me, of which he didn't do that for weeks, when i went there after 3 or 4 weeks, he said he can't fix it, i should try to get hold of the repair centre people. And because of the hustle to get my proof purchase which they asked for, much time past by. After almost 4 months i discovered that my laptop was opened at the back and 2 *****s were missing. So I decided to open it myself, were i found out that my laptop RAM was missing. I immediately went to vodacom, but found a new technician. I explained my frustration to him, and he called the manager who told me they will need evidence, so i must give the date when i was in store to bring the laptop, because 3 or 4 months past since i brought the laptop, i couldn't remember the exact date, but managed to give him the closest estimation. And he too promised to call me. But didn't do that either. So i decided to go store again a week later, and i asked him for feedback. There he told me that they can't get a footage which is 4 months old, as a result, they can't help me as there is no evidence, and he said its a "i say you say" situation. So just like that i was ****** a laptop RAM. How can i get assisted here? Because i am not willing to buy a ram wich vodacom took it.