The problem with a lot of ancillary orders is that they are fundamentally unenforceable. Some will have issues with evidence, others will have issues with the orders being open to interpretation, and many are simply too trivial for the parties, or the Court, to quantify spending resources on.
Your case is actually a good example of an order being open to interpretation - the order regarding non-denigration, etc. is apparently in effect when the child is with either parent, rather than communicating with either parent, so if you were to file a contravention order, it would be difficult for the Court to impose any kind of penalty in the first instance when the orders don't really impose any restriction on what's said during a phone call. At best, the Court might clarify the order.
However, I think the more pertinent question is whether any parenting orders made by the Court can actually stay the mother's poor conduct in practice. The reality of the matter is that parenting orders really only protect the child's right to be parented by both parents. They are significantly less capable of protecting the child from how their mum and dad choose to parent them.
So, rather than looking to legal avenues for redress, I'm inclined to suggest looking for remedies in the home. You are, after all, the primary carer, now, so it's your parenting style that will have the most influence on the child.
I'm not going to tell you what to do, but I will give you an example (just one, of many) from my own experience with my stepdaughter.
Mum's phone calls used to be inappropriate in that they were quite manipulative - "Here's all the fun kid-friendly stuff I'm doing while you're at dad's"; "Oh, is that all you're doing at dad's? That sounds so boring"; "Your cat misses you so much, he cried and cried and cried all night because he couldn't find you"; and then eventually, "You sound so sad, what's wrong? Do you miss mummy, do you? Well, if dad says you can come home, I'll come and get you straight away".
At the time, we only had my stepdaughter every second weekend, so as you can imagine, it was quite harrowing for my husband to have his daughter ask in tears to go back to mum's house after speaking to her on the phone. Sometimes, my stepdaughter would refuse to speak to her mum all together, such was the negative feeling that phone calls inspired in her, I think.
Perhaps it wasn't my place, perhaps it was manipulative on my part, but I approached it by changing the message that her mum was giving her. "Mummy knows when you're at dad's, maybe you could ask her to organise some fun things to do when you're at her house? Does mummy tell your cat that you're just at dad's and you'll be back on Monday?" Etc.
Eventually, my stepdaughter started asking her mum the same questions of her own accord, and so eventually, mum stopped trying to use phone calls to influence her feelings about being at dad's. Phone calls are much better, now.
So, rather than look for legal redress, see if there's some other way to manage it in the home. Use the vast amount of time you now have with her, to be the predominant influence on her.