Phone Broken, repaired still broken!No sms service

I sent my Samsung A5 in for repairs because it just started deleting data(new phone did not fall).after 3 weeks I received it back even worse than before I send it in. Telkom's response was just sorry its Samsung will have to send it in again (now its almost 2 moths I pay for this phone without having the use off it. I send it in again. Telkom did a sim swap because A5 uses nano sim and the only backup phone I have uses normal sim. Now I am having problems,I do not receive my sms's, receives it 2 days later and then I receive 5 of the same sms's. Went in to Telkom again they said it is the sim card that is faulty, did a sim swap again, still having the same problems.I cant make any EFT payment because I receive my OTP pin 2 days later. Telkom said they must no send a email with the problem to their back office to fix and this will take 24 hours.After 24 hours I still have to same problem and do not receive important sms's and can't make payments.<br> Also last month Telkom just increased my spending limit without my permission and just deducted it from my account. I am out of options, as it is not enough that I don't have use of the phone I am paying for it is now affecting my work!!