Telkom gave my Ricad number away.

I lost my phone and the simcard in December, I have been using this sim card for years. Then I went to the Telkom Rosebank branch and this rude woman who acted like she didn`t want to help me checked my number on the system so i can swim swap. Then she told me my number belongs to another person. Telkom was too quick to give my number away. What i don't understand is that i have been using this number for years and i registered it for my most personal things and accounts that can be compromised or hacked. This number has my most sensitive information. I used it at the bank, accounts and many more things. So basically, anyone from Telkom can just take a number that I bought directly in the store, then we are not safe with Telkom and it was Ricad. The least they could do is to check who previously owned it and monitor activity on the sim card if it`s been used or not and make attempts to get my number back. I believe my sim card was sold to someone within a month of not using it and they make it look like i was never the owner in the first place. The number is off , i tried calling it several times so how is it that it’s given to someone. Something is very fishy. Now when i log into my accounts, I have to reset the pins and the pin goes directly to that number. How is this safe for Telkom customers and their personal data protection if you just take the sim and give it to someone without thinking twice about what you are doing.