Additional Billing on Invoice - No one can explain!!!!!

My account for August was emailed to me, when I saw additional R529.00 charged to my COMPLETELY UNLIMITED deal. I check on my Telkom app and all the statement shows is 01 August R529.00 Google App - TINDER. After contacting the call centre, of which I was placed on hold for more than 15minutes for the consultant to try and VIEW my problem...... the problem is still not sorted. Firstly - she advised me that the number I provided for my account is a PREPAID number. I told her, can not be, the contract is up for renewal now, 2yrs Unlimited Deal Contract. I do not have this TINDER app on my phone - of which is a loan phone as my original phone was ****** about 2 months ago, when I did 'n sim Swop on my account. The current one I'm using, does not have any TINDER apps, so how can I be charged for TINDER, when its not downloaded on my phone. I was advised she can REMOVE this charge for the FUTURE...but this account still needs to be paid. I told her She must please logg a complaint for me, as I'm not happy and i'm not going to pay almost R600 for something I did not Download or use. She advised, sorry, if your billed for it, you will have to pay. The call was ended from my side, as I saw I'm not going to get ANYwhere on the phone with the call centre and their incompetance. I'm NOT going to pay the additional R529.00 that is charged, as she can not tell me from which phone this was downloaded. and I'm CERTAINLY NOT GOING TO RENEW MY CONTRACT WITH TELKOM NOW.