Very poor/ No service from MTN Wetsgate

I have handed my handset in for repair at MTN Westgate , to repair the following : 1 I cannot use capital letters on the Handset 2 I cannot use the letter A in WhatsApp 3 They must upgrade the Phone to Windows 10. After SIX WEEKS, after collecting the phone from the store, the lady told me the phone was fixed. After using the phone, I realized that nothing has been done. All the faults listed above are still present and I can not use it. MTN you must please come and collect the Handset, fix the phone or replace it with a new one Urgently. MTN Detail Activity 1- ********** 9759 Owner MAKHUT_c Comments Remendy Transaction 47408 Handset Lumia ********** ********** 9007