IN ONLY 5 MONTHS !!!!

We bought my engagement ring +- R75 000 and the matching wedding band for R10 000 at Browns Fourways. 5 months after the purchase a diamond from my wedding band dislodged. I was horrified. After countless emails and communications with their customer service assistant Amy Harris - It has been communicated that I must have done something to dislodge the diamond - for example hit my finger really hard on something ?!?!? Interestingly enough the diamond from the engagement ring acts as a barrier ... Which makes this impossible, in addition , I'm sure I would've felt that - obviously I didn't as it never happened ?!? I expected Browns to fix this and apologize - however we are expected to pay for this. I am utterly shocked at the principle behind this - honestly expected much better service from such a reputable jewlar.... Very disgusted!