Bad service

Good day, I have a personal loan with Nedbank account no ***, when the covid started Nedbank sent out sms giving you grace period for 3 months, I I requested the 3 months, but on the Nedbank app my term show 66 months and not 63 months the loan was original for 60 months so if you existent it with the 3 month grace it is suppose to change to 63 and not 66 months. I contacted the support center on the 9/12/2021 and I was informed that someone will get back to me, but no one contact me and I phoned again on the 17/12/2021 and the person said they phoned and I did not pick up the call, I said to the person no call came threw to me and if she can please look into the query and up and till today no one call me about my query ref no for my query is ***7