Make up time is difficult.
Make sure you do not discuss any of these problems with your daughter, and be very tactful when she asks about it. Do not be negative about your ex in front of your daughter.
Do not ever lose your cool when speaking to the wife.
You need to keep a detailed journal of every time she denies you contact, either by phone or in person. This journal will be gold in a contempt hearing. If need be, photo copy it weekly and mail it to yourself--just don't open the mail. Keep it as verification that you kept the journal weekly and did not just create it. Start asking for times outside the court order, as much as possible---if the wording includes "as the parties may agree", you are not limited to the schedule of access outlined. If she disagrees, more ammunition---you can claim that you have made every effort to see your daughter more, but has been denied by the ex.
If she continues to restrict access, you can claim a number of different things---Parental Alienation Syndrome among others, and you would have every right to go for MORE custody time due to her being continuously unreasonable. The more she does this, the more goes in your favor. Make a motion for more time, and you could possibly get it if she continues to deny you access.
Every time you talk to her in person, have a small hand held recorder in your hand--if it is in plain site she cannot claim any wrongdoing as you can claim it was in plain site.
Record your phone calls, but before doing so make sure that one party recording is legal in your state.
You have a good case, which can get better.