Was bought an f8 savannah cat as a gift and new very little about the breed. She is about 8 months old now and is becoming increasingly problematic - no issues with aggression, however I feel like a hostage in my own home! Behaviours which I’m struggling to cope with: Constant (and I mean constant) yowling to the point neighbours have complained and I now have to sleep with earplugs. I’ve attempted the ignore tactic however have often had to succumb due to the alternative being essentially neglect or starvation. - the only time she is quiet is when she has a mouthful of food. Stealing and destruction/hiding of jewellery or anything silicone/plastic. Constant scavenging despite being sufficiently fed at regular times. She’ll eat literally anything and I’m worried she’ll get into something harmful to her. She now is banned from the kitchen as she’s figured out how to open cupboards and the bread bins. Is there anything I can be doing to help lessen these behaviours? I know they seem minimal when listed but they affect every moment of my day spent at home which is when I should be relaxing. I am at the point where I am seriously and sadly considering asking the breeder to take her back which is a shame because she is genuinely a sweet natured cat and I am very fond of her as is my dog - her behaviours that I’m struggling with are clearly not malicious or aggressive (apart from perhaps the yowling?). I just can’t bear living in a constant state of heightened anxiety and as I rent a room out can’t expect that a potential flat mate should put up with that either. Any/all suggestions or opinions on whether the situation can be bettered or if I’m just in over my head would be greatly appreciated. I am not a quitter and have been trying my best since recieving her at 3 months to train her properly however I am at a lost and have never had experience with a cat so mischievous. She has been spayed which I had hoped would calm her down but has done the opposite. Like I said I am very fond of her but find myself beginning to resent her (which I know is not fair) meaning our relationship is becoming increasingly strained.