Welcome to the Workshop community @shayelee20. I'd be delighted to answer your question about repairing large holes in a wall.
Can I please ask what type of wall it is and how big is the hole? A picture of it would be very helpful in assisting community members to give some great advice.
Here's a step-by-step D.I.Y. guide on How to fix a hole in a plaster wall which you might find helpful. If the hole you have is larger than what they are covering I would be happy to give you further advice.
Hi if you dont want to buy a whole roll of tape as shown in video Bunnings do sell Pfeiffer plaster repair wall patches. One for holes up to 10cm one 15cm. The process is the same. Although with the bigger holes I would patch the hole behind first by gluing some gyprock to the back of the hole. Make sure if you do this the edge of your patch gyprock is recessed to the main wall so you can will up to the level of the wall.
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