My Samsung s5 cellphone is in for repairs

I sent my Samsung s5 in for repairs at the end of may and received it back on 10th of June. When I got home that phone was not picking up the sim, I took it back on 18 of June. Ever since then I kept getting excuses and no one ever calls me back , now the phone is still at smart care pmb and was told they going to do a claim and will take a future two weeks. I can't believe how poor the service Is, samsung is such a big brand yet the after sales device is so poor.ref no.05153