BAD SERVICE FROM FNB!!!!

I bought an S7 tablet with FNB 2 months ago, the S-pen became loose over the 2 months. 3 weeks ago I contact FNB to repair it, they then requested that I send both S-pen and tablet although the tablet worked 100%, so I did as they asked, 3 weeks later I still await it to be returned to me repaired, FNB sent it to their preferred and trusted repairers so it is their duty to keep me informed about how its going. I have had no correspondence whatsoever from FNB, I have to keep calling, I have been promised phone calls from managers to no avail. It ridiculous how a simple S-pen tip that is loose takes close to 3 weeks to fix, meanwhile I sit with no device to use for very important tasks. I am very disappointed in FNB connect and SSS Cellular (their repairer of choice). I am actually going to change banks to Nedbank or Standard bank, appalling service. I no longer want their tablet, they can keep it or replace it.