Day light *******

I am so devastated by the situation I am faced with at the moment moment, a day before yesterday or yesterday I called in the customer care number to enquire about my router because my data seems to deplete a lot without me utilizing it, so I was told that it would be impossible to be assisted over the phone so I was required to visit one of the stores I went to Clearwater yesterday with my quiry and a hope to be assisted only to find that I was only wasting my time I got there and was attended by some Indian guy who told me that I should go to the manufacturer then after a while, he asked me to wait for consultant that went out for over 20 minutes or so, upon her return she took time to attend to my problem then I decided to call the switchboard number since I was left unattended, I was then referred to technicians and they tried to assist me in tracing where my data was really going so I was told that there was a software update that utilized 4G and I was supposed to be recharged with 20G the guy I spoke to said I am on a 5G contract so I am trying to figure out. Could it be that MTN recharged me with 5G on the router knowing that there is no option to check the balance because the only way to check it is to remove the sim from the router device and insert it into a phone? Because I am left with no data from the 20G I am supposed to get. So the software utilized 4G what happened to the rest of my 16G left? I hope to get a response from you as I intend to escalate this matter if quiry is not attended to.