Oppo A40 is very bad

The Oppo A40 is a terrible phone. Slow as hell, the have so many clause at Truworths when you have to return it, it's like they know this phone's problems. While using the phone, it would have glitches on the screen especially when you're on a teams or zoom meeting, when a call comes on... The person who's been calling you asks why you take long to answer the call. I then tried to dial myself to see. From the dial phone it rings for 10 seconds but the phone doesn't ring, just when I'm about to drop the call, it starts ringing. I tried to return this nonsense, I regret why I gave away my Huawei Mate 20 lite which I had for more than 6 years, that was the best phone. This phone is only 2 weeks but it behaves like a 10 year old phone. The Ram expansion is useless. I know phones at 4G that behave best and better than this. Don't buy this Oppo phone it's for 13 year Olds.